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real_ceil_floor x : x \is real_num -> ceil x = floor x + (x \isn't a int_num).
Proof. case Ix: (x \is a int_num) => Rx /=. by apply/eqP; rewrite addr0 ceilNfloor eqr_oppLR floorN. apply/ceil_def; rewrite addrK; move: (real_floor_itv Rx). by rewrite le_eqVlt -intrEfloor Ix /= => /andP[-> /ltW]. Qed.
Lemma
real_ceil_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "addr0", "addrK", "apply", "ceil", "ceilNfloor", "ceil_def", "eqr_oppLR", "floor", "floorN", "int_num", "intrEfloor", "le_eqVlt", "ltW", "real_floor_itv", "real_num" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_floor x : truncn x = if 0 <= x then `|floor x|%N else 0%N.
Proof. move: (floorP x); rewrite truncEfloor realE. have [/le_floor|_]/= := boolP (0 <= x); first by rewrite floor0; case: floor. by case: ifP => [/le_floor|_ /eqP->//]; rewrite floor0; case: floor => [[]|]. Qed.
Lemma
truncn_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "floor0", "floorP", "le_floor", "realE", "truncEfloor", "truncn" ]
Relating Cnat and oldCnat.
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnP x : if 0 <= x then (truncn x)%:R <= x < (truncn x).+1%:R else truncn x == 0%N.
Proof. rewrite truncn_floor. case: (boolP (0 <= x)) => //= /[dup] /le_floor + /ger0_real/real_floor_itv. by rewrite floor0; case: (floor x) => // n _; rewrite absz_nat addrC -intS. Qed.
Lemma
truncnP
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "absz_nat", "addrC", "floor", "floor0", "ger0_real", "intS", "le_floor", "real_floor_itv", "truncn", "truncn_floor" ]
trunc and nat_num
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_itv x : 0 <= x -> (truncn x)%:R <= x < (truncn x).+1%:R.
Proof. by move=> x_ge0; move: (truncnP x); rewrite x_ge0. Qed.
Lemma
truncn_itv
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn", "truncnP" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_le x : ((truncn x)%:R <= x) = (0 <= x).
Proof. by case: ifP (truncnP x) => [+ /andP[] | + /eqP->//]. Qed.
Lemma
truncn_le
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn", "truncnP" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_truncnS_gt x : x \is real_num -> x < (truncn x).+1%:R.
Proof. by move/real_ge0P => [/truncn_itv/andP[]|/lt_le_trans->]. Qed.
Lemma
real_truncnS_gt
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "lt_le_trans", "real_ge0P", "real_num", "truncn", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_def x n : n%:R <= x < n.+1%:R -> truncn x = n.
Proof. case/andP=> lemx ltxm1; apply/eqP; rewrite eqn_leq -ltnS -[(n <= _)%N]ltnS. have/truncn_itv/andP[lefx ltxf1]: 0 <= x by apply: le_trans lemx; apply: ler0n. by rewrite -!(ltr_nat R) 2?(@le_lt_trans _ _ x). Qed.
Lemma
truncn_def
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "eqn_leq", "le_lt_trans", "le_trans", "ler0n", "ltnS", "ltr_nat", "truncn", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_ge_nat x n : 0 <= x -> (n <= truncn x)%N = (n%:R <= x).
Proof. move=> /truncn_itv /andP[letx ltxt1]; apply/idP/idP => lenx. by apply: le_trans letx; rewrite ler_nat. by rewrite -ltnS -(ltr_nat R); apply: le_lt_trans ltxt1. Qed.
Lemma
truncn_ge_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "le_lt_trans", "le_trans", "ler_nat", "ltnS", "ltr_nat", "truncn", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_gt_nat x n : (n < truncn x)%N = (n.+1%:R <= x).
Proof. case: ifP (truncnP x) => [x0 _ | x0 /eqP->]; first by rewrite truncn_ge_nat. by rewrite ltn0; apply/esym/(contraFF _ x0)/le_trans. Qed.
Lemma
truncn_gt_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "le_trans", "ltn0", "truncn", "truncnP", "truncn_ge_nat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_lt_nat x n : 0 <= x -> (truncn x < n)%N = (x < n%:R).
Proof. by move=> ?; rewrite real_ltNge ?ger0_real// ltnNge truncn_ge_nat. Qed.
Lemma
truncn_lt_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ger0_real", "ltnNge", "real_ltNge", "truncn", "truncn_ge_nat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_truncn_le_nat x n : x \is real_num -> (truncn x <= n)%N = (x < n.+1%:R).
Proof. by move=> ?; rewrite real_ltNge// leqNgt truncn_gt_nat. Qed.
Lemma
real_truncn_le_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "leqNgt", "real_ltNge", "real_num", "truncn", "truncn_gt_nat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_eq x n : 0 <= x -> (truncn x == n) = (n%:R <= x < n.+1%:R).
Proof. by move=> xr; apply/eqP/idP => [<-|]; [exact: truncn_itv|exact: truncn_def]. Qed.
Lemma
truncn_eq
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "truncn", "truncn_def", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
le_truncn : {homo truncn : x y / x <= y >-> (x <= y)%N}.
Proof. move=> x y lexy; move: (truncnP x) (truncnP y). case: ifP => [x0 /andP[letx _] | x0 /eqP->//]. case: ifP => [y0 /andP[_] | y0 /eqP->]; [|by rewrite (le_trans x0 lexy) in y0]. by move=> /(le_lt_trans lexy) /(le_lt_trans letx); rewrite ltr_nat ltnS. Qed.
Lemma
le_truncn
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "le_lt_trans", "le_trans", "ltnS", "ltr_nat", "truncn", "truncnP" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natrK : cancel (GRing.natmul 1) truncn.
Proof. by move=> m; apply: truncn_def; rewrite ler_nat ltr_nat ltnS leqnn. Qed.
Lemma
natrK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "leqnn", "ler_nat", "ltnS", "ltr_nat", "natmul", "truncn", "truncn_def" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natrEtruncn x : (x \is a nat_num) = ((truncn x)%:R == x).
Proof. by apply/natrP/eqP => [[n ->]|<-]; [rewrite natrK | exists (truncn x)]. Qed.
Lemma
natrEtruncn
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "nat_num", "natrK", "natrP", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
archi_boundP x : 0 <= x -> x < (bound x)%:R.
Proof. move=> x_ge0; case/truncn_itv/andP: (normr_ge0 x) => _. exact/le_lt_trans/real_ler_norm/ger0_real. Qed.
Lemma
archi_boundP
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "bound", "ger0_real", "le_lt_trans", "normr_ge0", "real_ler_norm", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnK : {in nat_num, cancel truncn (GRing.natmul 1)}.
Proof. by move=> x; rewrite natrEtruncn => /eqP. Qed.
Lemma
truncnK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "nat_num", "natmul", "natrEtruncn", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn0 : truncn 0 = 0%N.
Proof. exact: natrK 0%N. Qed.
Lemma
truncn0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "natrK", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn1 : truncn 1 = 1%N.
Proof. exact: natrK 1%N. Qed.
Lemma
truncn1
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "natrK", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnD : {in nat_num & nneg_num, {morph truncn : x y / x + y >-> (x + y)%N}}.
Proof. move=> _ y /natrP[n ->] y_ge0; apply: truncn_def. by rewrite -addnS !natrD !natrK lerD2l ltrD2l truncn_itv. Qed.
Lemma
truncnD
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "addnS", "apply", "lerD2l", "ltrD2l", "nat_num", "natrD", "natrK", "natrP", "nneg_num", "truncn", "truncn_def", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnM : {in nat_num &, {morph truncn : x y / x * y >-> (x * y)%N}}.
Proof. by move=> _ _ /natrP[n1 ->] /natrP[n2 ->]; rewrite -natrM !natrK. Qed.
Lemma
truncnM
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "nat_num", "natrK", "natrM", "natrP", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnX n : {in nat_num, {morph truncn : x / x ^+ n >-> (x ^ n)%N}}.
Proof. by move=> _ /natrP[n1 ->]; rewrite -natrX !natrK. Qed.
Lemma
truncnX
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "nat_num", "natrK", "natrP", "natrX", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_gt0 x : (0 < truncn x)%N = (1 <= x).
Proof. case: ifP (truncnP x) => [x0 | x0 /eqP<-]; first by rewrite truncn_ge_nat. by rewrite ltnn; apply/esym/(contraFF _ x0)/le_trans. Qed.
Lemma
truncn_gt0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "le_trans", "ltnn", "truncn", "truncnP", "truncn_ge_nat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn0Pn x : reflect (truncn x = 0%N) (~~ (1 <= x)).
Proof. by rewrite -truncn_gt0 -eqn0Ngt; apply: eqP. Qed.
Lemma
truncn0Pn
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "eqn0Ngt", "truncn", "truncn_gt0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
sum_truncnK I r (P : pred I) F : (forall i, P i -> F i \is a nat_num) -> (\sum_(i <- r | P i) truncn (F i))%:R = \sum_(i <- r | P i) F i.
Proof. by rewrite natr_sum => natr; apply: eq_bigr => i /natr /truncnK. Qed.
Lemma
sum_truncnK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "eq_bigr", "nat_num", "natr_sum", "truncn", "truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
prod_truncnK I r (P : pred I) F : (forall i, P i -> F i \is a nat_num) -> (\prod_(i <- r | P i) truncn (F i))%:R = \prod_(i <- r | P i) F i.
Proof. by rewrite natr_prod => natr; apply: eq_bigr => i /natr /truncnK. Qed.
Lemma
prod_truncnK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "eq_bigr", "nat_num", "natr_prod", "truncn", "truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natr_sum_eq1 (I : finType) (P : pred I) (F : I -> R) : (forall i, P i -> F i \is a nat_num) -> \sum_(i | P i) F i = 1 -> {i : I | [/\ P i, F i = 1 & forall j, j != i -> P j -> F j = 0]}.
Proof. move=> natF /eqP; rewrite -sum_truncnK// -[1]/1%:R eqr_nat => /sum_nat_eq1 exi. have [i /and3P[Pi /eqP f1 /forallP a]] : {i : I | [&& P i, truncn (F i) == 1 & [forall j : I, ((j != i) ==> P j ==> (truncn (F j) == 0))]]}. apply/sigW; have [i [Pi /eqP f1 a]] := exi; exists i; apply/and3P; split=> //. by ap...
Lemma
natr_sum_eq1
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "eqr_nat", "f1", "forallP", "nat_num", "sigW", "split", "sum_nat_eq1", "sum_truncnK", "truncn", "truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natr_mul_eq1 x y : x \is a nat_num -> y \is a nat_num -> (x * y == 1) = (x == 1) && (y == 1).
Proof. by do 2!move/truncnK <-; rewrite -natrM !pnatr_eq1 muln_eq1. Qed.
Lemma
natr_mul_eq1
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "muln_eq1", "nat_num", "natrM", "pnatr_eq1", "truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natr_prod_eq1 (I : finType) (P : pred I) (F : I -> R) : (forall i, P i -> F i \is a nat_num) -> \prod_(i | P i) F i = 1 -> forall i, P i -> F i = 1.
Proof. move=> natF /eqP; rewrite -prod_truncnK// -[1]/1%:R eqr_nat prod_nat_seq_eq1. move/allP => a i Pi; apply/eqP; rewrite -[F i]truncnK ?natF// eqr_nat. by apply: implyP Pi; apply: a; apply: mem_index_enum. Qed.
Lemma
natr_prod_eq1
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "allP", "apply", "eqr_nat", "mem_index_enum", "nat_num", "prod_nat_seq_eq1", "prod_truncnK", "truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
raddfZ_nat a u : a \is a nat_num -> f (a *: u) = a *: f u.
Proof. by move=> /natrP[n ->]; apply: raddfZnat. Qed.
Lemma
raddfZ_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "nat_num", "natrP", "raddfZnat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
rpredZ_nat (S : addrClosed V) : {in nat_num & S, forall z u, z *: u \in S}.
Proof. by move=> _ u /natrP[n ->]; apply: rpredZnat. Qed.
Lemma
rpredZ_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "addrClosed", "apply", "nat_num", "natrP", "rpredZnat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
raddfZ_int a u : a \is a int_num -> f (a *: u) = a *: f u.
Proof. by move=> /intrP[m ->]; rewrite !scaler_int raddfMz. Qed.
Lemma
raddfZ_int
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "int_num", "intrP", "raddfMz", "scaler_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
rpredZ_int (S : zmodClosed V) : {in int_num & S, forall z u, z *: u \in S}.
Proof. by move=> _ u /intrP[m ->] ?; rewrite scaler_int rpredMz. Qed.
Lemma
rpredZ_int
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "int_num", "intrP", "rpredMz", "scaler_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
aut_natr nu : {in nat_num, nu =1 id}.
Proof. by move=> _ /natrP[n ->]; apply: rmorph_nat. Qed.
Lemma
aut_natr
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "id", "nat_num", "natrP", "rmorph_nat" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
aut_intr nu : {in int_num, nu =1 id}.
Proof. by move=> _ /intrP[m ->]; apply: rmorph_int. Qed.
Lemma
aut_intr
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "id", "int_num", "intrP", "rmorph_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc_itv
:= truncn_itv (only parsing).
Notation
trunc_itv
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc_def
:= truncn_def (only parsing).
Notation
trunc_def
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn_def" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncK
:= truncnK (only parsing).
Notation
truncK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc0
:= truncn0 (only parsing).
Notation
trunc0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc1
:= truncn1 (only parsing).
Notation
trunc1
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn1" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncD
:= truncnD (only parsing).
Notation
truncD
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncnD" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncM
:= truncnM (only parsing).
Notation
truncM
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncnM" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncX
:= truncnX (only parsing).
Notation
truncX
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncnX" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc_gt0
:= truncn_gt0 (only parsing).
Notation
trunc_gt0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn_gt0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc0Pn
:= truncn0Pn (only parsing).
Notation
trunc0Pn
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn0Pn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
sum_truncK
:= sum_truncnK (only parsing).
Notation
sum_truncK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "sum_truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
prod_truncK
:= prod_truncnK (only parsing).
Notation
prod_truncK
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "prod_truncnK" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
trunc_floor
:= truncn_floor (only parsing).
Notation
trunc_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn_floor" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_ge_floor
:= real_floor_le (only parsing).
Notation
real_ge_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_floor_le" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_lt_succ_floor
:= real_floorD1_gt (only parsing).
Notation
real_lt_succ_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_floorD1_gt" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_gt_pred_ceil
:= real_floorD1_gt (only parsing).
Notation
real_gt_pred_ceil
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_floorD1_gt" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_le_ceil
:= real_ceil_ge (only parsing).
Notation
real_le_ceil
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_ceil_ge" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_le
:= le_ceil (only parsing).
Notation
ceil_le
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "le_ceil" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natrE
:= natrEtruncn (only parsing).
Notation
natrE
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "natrEtruncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
le_ceil_tmp
:= le_ceil (only parsing).
Notation
le_ceil_tmp
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "le_ceil" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_floor_ge_int_tmp
:= real_floor_ge_int (only parsing).
Notation
real_floor_ge_int_tmp
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_floor_ge_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
real_ceil_le_int_tmp
:= real_ceil_le_int (only parsing).
Notation
real_ceil_le_int_tmp
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_ceil_le_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
upper_nthrootP x i : (bound x <= i)%N -> x < 2%:R ^+ i.
Proof. case/truncn_itv/andP: (normr_ge0 x) => _ /ltr_normlW xlt le_b_i. by rewrite (lt_le_trans xlt) // -natrX ler_nat (ltn_trans le_b_i) // ltn_expl. Qed.
Lemma
upper_nthrootP
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "bound", "ler_nat", "lt_le_trans", "ltn_expl", "ltn_trans", "ltr_normlW", "natrX", "normr_ge0", "truncn_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnS_gt x : x < (truncn x).+1%:R.
Proof. exact: real_truncnS_gt. Qed.
Lemma
truncnS_gt
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_truncnS_gt", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_le_nat x n : (truncn x <= n)%N = (x < n.+1%:R).
Proof. exact: real_truncn_le_nat. Qed.
Lemma
truncn_le_nat
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "real_truncn_le_nat", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_itv x : (floor x)%:~R <= x < (floor x + 1)%:~R.
Proof. exact: real_floor_itv. Qed.
Lemma
floor_itv
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_le x : (floor x)%:~R <= x.
Proof. exact: real_floor_le. Qed.
Lemma
floor_le
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_le" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floorD1_gt x : x < (floor x + 1)%:~R.
Proof. exact: real_floorD1_gt. Qed.
Lemma
floorD1_gt
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floorD1_gt" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_ge_int x n : (n <= floor x) = (n%:~R <= x).
Proof. exact: real_floor_ge_int. Qed.
Lemma
floor_ge_int
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_ge_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_lt_int x n : (floor x < n) = (x < n%:~R).
Proof. exact: real_floor_lt_int. Qed.
Lemma
floor_lt_int
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_lt_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_eq x n : (floor x == n) = (n%:~R <= x < (n + 1)%:~R).
Proof. exact: real_floor_eq. Qed.
Lemma
floor_eq
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_eq" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floorDzr : {in @int_num R, {morph floor : x y / x + y}}.
Proof. by move=> x xz y; apply/real_floorDzr/num_real. Qed.
Lemma
floorDzr
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "floor", "int_num", "num_real", "real_floorDzr" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floorDrz x y : y \is a int_num -> floor (x + y) = floor x + floor y.
Proof. by move=> yz; apply/real_floorDrz/yz/num_real. Qed.
Lemma
floorDrz
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "floor", "int_num", "num_real", "real_floorDrz" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_ge0 x : (0 <= floor x) = (0 <= x).
Proof. exact: real_floor_ge0. Qed.
Lemma
floor_ge0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_ge0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_le0 x : (floor x <= 0) = (x < 1).
Proof. exact: real_floor_le0. Qed.
Lemma
floor_le0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor", "real_floor_le0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_itv x : (ceil x - 1)%:~R < x <= (ceil x)%:~R.
Proof. exact: real_ceil_itv. Qed.
Lemma
ceil_itv
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_itv" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceilB1_lt x : (ceil x - 1)%:~R < x.
Proof. exact: real_ceilB1_lt. Qed.
Lemma
ceilB1_lt
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceilB1_lt" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_ge x : x <= (ceil x)%:~R.
Proof. exact: real_ceil_ge. Qed.
Lemma
ceil_ge
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_ge" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_le_int x n : (ceil x <= n) = (x <= n%:~R).
Proof. exact: real_ceil_le_int. Qed.
Lemma
ceil_le_int
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_le_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_gt_int x n : (n < ceil x) = (n%:~R < x).
Proof. exact: real_ceil_gt_int. Qed.
Lemma
ceil_gt_int
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_gt_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_eq x n : (ceil x == n) = ((n - 1)%:~R < x <= n%:~R).
Proof. exact: real_ceil_eq. Qed.
Lemma
ceil_eq
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_eq" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceilDzr : {in @int_num R, {morph ceil : x y / x + y}}.
Proof. by move=> x xz y; apply/real_ceilDzr/num_real. Qed.
Lemma
ceilDzr
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "ceil", "int_num", "num_real", "real_ceilDzr" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceilDrz x y : y \is a int_num -> ceil (x + y) = ceil x + ceil y.
Proof. by move=> yz; apply/real_ceilDrz/yz/num_real. Qed.
Lemma
ceilDrz
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "ceil", "int_num", "num_real", "real_ceilDrz" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_ge0 x : (0 <= ceil x) = (-1 < x).
Proof. exact: real_ceil_ge0. Qed.
Lemma
ceil_ge0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_ge0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_le0 x : (ceil x <= 0) = (x <= 0).
Proof. exact: real_ceil_le0. Qed.
Lemma
ceil_le0
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "real_ceil_le0" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_floor x : ceil x = floor x + (x \isn't a int_num).
Proof. exact: real_ceil_floor. Qed.
Lemma
ceil_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil", "floor", "int_num", "real_ceil_floor" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ge_floor
:= floor_le (only parsing).
Notation
ge_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor_le" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
lt_succ_floor
:= floorD1_gt (only parsing).
Notation
lt_succ_floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floorD1_gt" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
gt_pred_ceil
:= ceilB1_lt (only parsing).
Notation
gt_pred_ceil
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceilB1_lt" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_le_tmp
:= floor_le (only parsing).
Notation
floor_le_tmp
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor_le" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_ge_int_tmp
:= floor_ge_int (only parsing).
Notation
floor_ge_int_tmp
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "floor_ge_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ceil_le_int_tmp
:= ceil_le_int (only parsing).
Notation
ceil_le_int_tmp
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "ceil_le_int" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
natr_aut x : (nu x \is a nat_num) = (x \is a nat_num).
Proof. by apply/idP/idP=> /[dup] ? /(aut_natr nu) => [/fmorph_inj <-| ->]. Qed.
Lemma
natr_aut
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "apply", "aut_natr", "fmorph_inj", "nat_num" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
intr_aut x : (nu x \is a int_num) = (x \is a int_num).
Proof. by rewrite !intrE -rmorphN !natr_aut. Qed.
Lemma
intr_aut
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "int_num", "intrE", "natr_aut", "rmorphN" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
conj_natr x : x \is a nat_num -> x^* = x.
Proof. by move/Rreal_nat/CrealP. Qed.
Lemma
conj_natr
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "CrealP", "Rreal_nat", "nat_num" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
conj_intr x : x \is a int_num -> x^* = x.
Proof. by move/Rreal_int/CrealP. Qed.
Lemma
conj_intr
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "CrealP", "Rreal_int", "int_num" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
Znat_def (n : int) : (n \is a nat_num) = (0 <= n).
Proof. by []. Qed.
Lemma
Znat_def
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "int", "nat_num" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
ZnatP (m : int) : reflect (exists n : nat, m = n) (m \is a nat_num).
Proof. by case: m => m; constructor; [exists m | case]. Qed.
Lemma
ZnatP
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "int", "nat", "nat_num" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
NumDomain_isArchimedean R
:= (NumDomain_hasTruncn R) (only parsing).
Notation
NumDomain_isArchimedean
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
Build T U
:= (NumDomain_hasTruncn.Build T U) (only parsing).
Notation
Build
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncn_itv x : 0 <= x -> (truncn x)%:R <= x < (truncn x).+1%:R.
Proof. by move=> x_ge0; move: (truncn_subproof x); rewrite x_ge0. Qed.
Fact
truncn_itv
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "truncn", "truncn_subproof" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor (x : R) : int
:= if 0 <= x then Posz (truncn x) else if x < 0 then - Posz (truncn (- x) + ~~ int_num x) else 0.
Definition
floor
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "Posz", "int", "int_num", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
floor_subproof x : if x \is real_num then (floor x)%:~R <= x < (floor x + 1)%:~R else floor x == 0.
Proof. rewrite /floor intrE !natrE negb_or realE. case: (comparableP x 0) (@truncn_itv x) => //=; try by rewrite -PoszD addn1 -pmulrn => _ ->. move=> x_lt0 _; move: (truncn_subproof x); rewrite lt_geF // => /eqP ->. rewrite gt_eqF //=; move: x_lt0. rewrite [_ + 1]addrC -opprB !intrN lerNl ltrNr andbC -oppr_gt0. move:...
Fact
floor_subproof
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "Posz", "PoszD", "addn0", "addn1", "addrA", "addrC", "comparableP", "eqVneq", "floor", "gt_eqF", "gtrBl", "intrB", "intrE", "intrN", "last", "le_eqVlt", "lerNl", "lexx", "ltW", "lt_geF", "ltrNr", "mulr1z", "natrE", "opprB", "oppr_gt0", "pmulrn", "realE", "real_n...
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
truncnE x : truncn x = if floor x is Posz n then n else 0.
Proof. rewrite /floor. case: (comparableP x 0) (truncn_subproof x) => [+ /eqP ->| |_ /eqP ->|] //=. by case: (_ + _)%N. Qed.
Fact
truncnE
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "Posz", "comparableP", "floor", "truncn", "truncn_subproof" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d
intrP x : reflect (exists n, x = n%:~R) (int_num x).
Proof. rewrite intrE !natrE; apply: (iffP idP) => [|[n ->]]; last first. by case: n => n; rewrite ?NegzE ?opprK natrK eqxx // orbT. rewrite -eqr_oppLR !pmulrn -intrN. by move=> /orP[] /eqP<-; [exists (truncn x) | exists (- Posz (truncn (- x)))]. Qed.
Fact
intrP
algebra
algebra/archimedean.v
[ "HB", "structures", "mathcomp", "ssreflect", "ssrfun", "ssrbool", "eqtype", "ssrnat", "seq", "choice", "fintype", "bigop", "nmodule", "order", "rings_modules_and_algebras", "divalg", "decfield", "poly", "orderedzmod", "numdomain", "numfield", "ssrint", "Order.TTheory", ...
[ "NegzE", "Posz", "apply", "eqr_oppLR", "eqxx", "int_num", "intrE", "intrN", "last", "natrE", "natrK", "opprK", "pmulrn", "truncn" ]
https://github.com/math-comp/math-comp
91d97df9cf3204b4dab84f4e24bc633e84b6473d