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help-10
626e67a80539427683c11e0e853b5d31
251,854,584,597,708,800
PapaBread
01/26/2022 12:10:18
If it's still just percent it's the same
0
1
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:10:27
%w/w %w/v and %v/v
1
0
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:10:45
they're the easier ones to start with
1
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help-10
626e67a80539427683c11e0e853b5d31
251,854,584,597,708,800
PapaBread
01/26/2022 12:10:55
Is w representing mass?
0
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:11:00
yes
1
0
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303
help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:11:03
weight/mass
1
0
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303
help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:11:15
in chemistry it's used interchangeably as far as i know
1
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:11:52
so you're supposed to calculate concentration with both volume and mass
1
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help-10
626e67a80539427683c11e0e853b5d31
251,854,584,597,708,800
PapaBread
01/26/2022 12:12:48
Yeah that'd be the molar way I think
0
1
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:14:03
huh
1
0
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help-10
626e67a80539427683c11e0e853b5d31
251,854,584,597,708,800
PapaBread
01/26/2022 12:14:31
Since molar concentration is moles per liter
0
1
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303
help-10
626e67a80539427683c11e0e853b5d31
251,854,584,597,708,800
PapaBread
01/26/2022 12:15:07
I guess it's not technically mass but it's close enough
0
1
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:15:51
oh no Jesse
1
0
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help-10
626e67a80539427683c11e0e853b5d31
251,854,584,597,708,800
PapaBread
01/26/2022 12:16:07
I've never liked chemistry
0
1
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:17:02
i mean it's not bad
1
0
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:17:17
it's just taught boringly
1
0
null
null
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:17:42
you could make sugar rockets with... well, sugar and potassium nitrate
1
0
null
null
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303
help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:17:59
super powerful and explosive and anti-finger
1
0
null
null
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null
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303
help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:18:26
either way im not making any sense through this
1
0
null
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help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:18:36
thanks but rip
1
0
null
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303
help-10
626e67a80539427683c11e0e853b5d31
875,660,803,712,368,600
Rashid Ibn Muhammed Ibn Abjad
01/26/2022 12:19:02
.close
1
0
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 12:36:27
Why is an empty set the subset of all sets? Most of the proofs I have looked at utilise the concept of vacuous truth, a concept that I haven't been able to grasp yet. One proof I looked at went along the lines of: "You have 5 objects and take it way, then you are left with nothing/it is empty, you have zero objects w...
1
0
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help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:41:03
suppose the empty set *isn't* a subset of A for any set A
0
1
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:41:17
then that means there exists an element in {} not in A
0
1
null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:41:22
Contradiction.
0
1
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 12:44:39
Definition of subset: $$A\subseteq B:= (\forall a\in A)(a\in B)$$
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null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:45:04
Was waiting for them to respond.
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1
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help-10
1adb70e7783d4a1dbef820788afcd08d
510,789,298,321,096,700
TeXit
01/26/2022 12:45:08
**Shuri2060**
https://cdn.discordapp.c…119171756033.png
321445119171756033.png
0
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884,760,473,675,898,900
LondonAnd
4619
LondonAnd
false
305
help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 12:54:24
I have seen this proof and it's still confusing
1
0
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help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 12:54:34
Let us take a random set A
1
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:55:14
random non-empty set A*
0
1
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 12:55:31
When we assume that the empty set is not a subset, this means that the content of the empty set is not in A
1
0
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 12:55:54
'there is something in the empty set that is not in A'
0
1
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:56:33
If we assume {} is not a subset, then that means {} has something not in A
0
1
186,109,587,366,215,680
Omegabet_
9771
Omegabet_
false
305
help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 12:56:46
But doesn't the empty set not have any element is the first place, akin to saying that A does not contain "no element" ?
1
0
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:56:49
ie {} is non-empty
0
1
null
null
null
null
null
305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:57:22
For example: {1,2} is a subset of {1,2,3} cause every element of the 1st is in the 2nd
0
1
null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:57:39
However, {1,2,3} is not a subset of {1,2} because 3 is in the 1st but not in the 2nd
0
1
null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 12:58:55
But doesn't the empty set have no elements in the first place? I don't think I understand what an empty set means in the first place then.
1
0
null
null
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help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 12:58:58
Yes. And this is a contradiction.
0
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321,445,119,171,756,000
Shuri2060
9525
a μ-er
false
305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 12:59:07
You assumed {} is not a subset of A And reached a contradiction.
0
1
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:59:09
it's the set with no elements
0
1
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:59:33
In our universe of discourse, {} is either a subset or a superset of A
0
1
null
null
null
null
null
305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 12:59:44
we assumed not a subset, so we suppose {} is a superset of A
0
1
null
null
null
null
null
305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 13:00:00
to which bullshit b/c A is not a subset of {}
0
1
884,760,473,675,898,900
LondonAnd
4619
LondonAnd
false
305
help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 13:08:07
Still nothing
1
0
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help-10
1adb70e7783d4a1dbef820788afcd08d
884,760,473,675,898,900
LondonAnd
01/26/2022 13:13:32
Example. A={1,2,3} For {} to not be a subset, it must have an element which is not in A But if {} has no elements in the first place, how can it be a subset? Taking the opposite, let {} not be a subset of A This means that {} has an element that is not in A But since {} has no elements, it's impossible for the abov...
1
0
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 13:28:42
@LondonAnd 'But if {} has no elements in the first place, how can it be a subset?'
0
1
null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 13:28:50
Where are you coming from with this.
0
1
null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 13:28:59
Perhaps we should agree on the definition of 'subset' first
0
1
null
null
null
null
null
305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 13:29:02
before going any further
0
1
null
null
null
null
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305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 13:29:30
'If A is a subset of B, then for each element x of A, x is an element of B'
0
1
null
null
null
null
null
305
help-10
1adb70e7783d4a1dbef820788afcd08d
321,445,119,171,756,000
Shuri2060
01/26/2022 13:30:16
Also, what axiom are you referring to?
0
1
884,760,473,675,898,900
LondonAnd
4619
LondonAnd
false
305
help-10
1adb70e7783d4a1dbef820788afcd08d
186,109,587,366,215,680
Omegabet_
01/26/2022 13:43:21
> For {} to not be a subset, it must have an element which is not in A Yes, that's the point
0
1
null
null
null
null
null
306
help-10
27e60db1af2f47d8a67e195d4097c04a
365,331,735,191,224,300
eastwolf2021
01/26/2022 14:30:30
https://cdn.discordapp.c…2444/unknown.png
unknown.png
1
0
null
null
null
null
null
306
help-10
27e60db1af2f47d8a67e195d4097c04a
365,331,735,191,224,300
eastwolf2021
01/26/2022 14:31:02
i'm just.. totally lost. help appreciated!
1
0
null
null
null
null
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306
help-10
27e60db1af2f47d8a67e195d4097c04a
365,331,735,191,224,300
eastwolf2021
01/26/2022 15:16:50
.close
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:25:20
I want to calculate the dimension of U however the triplet (u1, u2, u3) is not a basis, because they are linearly dependent Could someone give me input on this?
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:25:38
https://cdn.discordapp.c…2430/unknown.png
unknown.png
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:25:50
https://cdn.discordapp.c…4320/unknown.png
unknown.png
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:26:35
V = Q^4 (Q = fractions)
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:27:06
I've calculated rref: 1 2 3 0 0 0 0 0 0 0 0 0
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:33:02
(rationals would be more appropriate)
0
1
null
null
null
null
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:33:25
Okay so.. you've put your vectors as columns in a matrix?
0
1
null
null
null
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:33:32
yes
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:33:52
great, so the vector corresponding to the first column, will form a basis to U
0
1
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:35:50
In general, when you're looking for a basis , and you align your spanning vectors in _columns_ then once you've achieved the rref form, then your pivots will indicate which of the vectors will form a basis
0
1
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:37:22
however .. are you sure about your result?
0
1
360,857,322,496,458,750
SilberSeele
6698
SilberSeele
false
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:37:42
it seems to me that there are 2 vectors here that form a bsis
0
1
360,857,322,496,458,750
SilberSeele
6698
SilberSeele
false
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:38:05
since u3 is linearly dependant on u1 and u2 (check 2*u2-u1)
0
1
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:39:33
1 3 5 0 4 8 1 2 3 2 1 0 ----------- 1-3, 4-3 0 1 2 0 4 8 1 2 3 0 -3 - 6 ----------- 2+4 0 1 2 0 4 8 1 2 3 0 1 2
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:40:09
that will give you 2 pivots
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1
null
null
null
null
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:40:34
+1 for the effort of writing that out lol
0
1
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:41:16
so V is dim 4 and U is dim 2?
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:41:24
yea
0
1
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:41:33
gotcha
1
0
null
null
null
null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:41:51
do you understand how to pick your basis tho
0
1
null
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null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:42:33
mom
1
0
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null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:42:53
:blushed:
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:44:05
:sad_think:
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1
null
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:44:16
:sad_times:
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 15:53:12
@Deus_Vult v1 = 1, -1, 1, 0 v2 = 0 0 0 1
1
0
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:54:34
?
0
1
null
null
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null
null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 15:55:02
@SilberSeele
0
1
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 16:04:50
x1= x3 x2 = -2x3 -------- x3 -2x3 x3 --------- a *(1, -2, 1)
1
0
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null
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:05:36
i think I lost you bruv
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1
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:05:44
what are you attempting to do now?
0
1
244,129,917,732,651,000
Deus_Vult
9771
Deus_Vult
false
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 16:09:56
this. I have two pivots, x1 and x2 and x3 is free 1 0 -1 => x1 -x3 = 0 => x1 = x3 0 1 2 => x2 +2x3 = 0 => x2 = -2x3 and x3 =x3
1
0
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:10:44
:devastation:
0
1
360,857,322,496,458,750
SilberSeele
6698
SilberSeele
false
307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:10:59
and your final result ?
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1
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307
help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:11:42
your final result is the solution vector (1,-2,1) ?
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 16:11:48
-------- x3 -2x3 x3 --------- a *(1, -2, 1)
1
0
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:12:08
so this right?
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1
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:12:10
okay
0
1
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:12:14
what does the final result tell you?
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 16:13:15
that the dimension is 1 not 2?
1
0
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 16:13:36
since dimK (V ) = dim(V ) := n ?
1
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
360,857,322,496,458,750
SilberSeele
01/26/2022 16:14:03
with (v1 , . . . , vn) basis of V
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:14:03
Okay First of
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1
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help-10
104d3f239dd64dcf80ffbd973ec68bb3
244,129,917,732,651,000
Deus_Vult
01/26/2022 16:14:13
When you're trying to find a basis out of spanning vectors
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