Statement:
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If $f$ is big-O of $g$ and $h$ is big-O of $1$, then $f \cdot h$ is big-O of $g$.
The following lemmas are all equivalent: big_mult_1 big_mult_1' small_mult_1 small_mult_1' small_mult_1'' small_mult_1''' big_1_mult big_1_mult' small_1_mult small_1_mult' small_1_mult'' small_1_mult'''
$\mathcal{O}(f) = \mathcal{O}(g)$ if and only if $f \in \Theta(g)$.
If $f(x)$ is in $L_F(g(x))$ for all $x$, then $\prod_{x \in A} f(x)$ is in $L_F(\prod_{x \in A} g(x))$.
If $f$ is a function from $A$ to $L^1$, then the product of the functions in $f$ is in $L^1$.
If $f(x) = o(g(x))$, then $\lim_{x \to \infty} (f(x) + g(x)) = \lim_{x \to \infty} g(x)$.
If $g$ is $o(f)$, then $\lim_{x \to \infty} (f(x) + g(x)) = \lim_{x \to \infty} f(x)$.
If $f$ is $o(g)$, then $\lim_{x \to a} (f(x) - g(x)) = \lim_{x \to a} g(x)$.
If $g$ is $o(f)$, then $L(f - g) = L(f)$.
The following identities hold: $x + 0 = x$, $0 + x = x$, $x - 0 = x$, $0 - x = -x$.
If $f$ is $O(g)$ and $\Omega(g)$, then $f$ is $\Theta(g)$.
If $f \in \Theta(g)$, then $f \in O(g)$ and $f \in \Omega(g)$.
If $f$ is a function, then $f \in \Theta[F](f)$.
If $f$ is big-Theta of $g$, then $g$ is big-Theta of $f$.
The Landau symbols $\Omega$, $\omega$, and $\Theta$ are symmetric.
The Landau symbols $o$, $\omega$, $\Omega$, $\Theta$ are defined.
If $f$ is eventually bounded by $cg$ for some constant $c$, then $f$ is big-O of $g$.
If $f$ is a small-omega function of $g$, then $f$ is eventually bounded below by a constant multiple of $g$.
If $f$ and $g$ are functions such that $f(x)$ is eventually bounded above and below by $c_1 g(x)$ and $c_2 g(x)$ respectively, then $f(x) \in \Theta(g(x))$.
If $f$ and $g$ are eventually equal, then $f \in \Theta(g)$.
If $f$ is in $L(F, g(h))$, and $h$ and $h'$ are eventually equal, then $f$ is in $L(F, g(h'))$.
If $f$ and $f'$ are eventually equal, and $g$ is a function such that $g(f')$ is in $L(F,h)$, then $g(f)$ is in $L(F,h)$.
If $f \in L_F(g)$ and $h \in \Theta_F(g)$, then $f \in L_F(h)$.
If $g$ is $\Theta(f)$ and $g$ is $O(h)$, then $f$ is $O(h)$.
If $f \in O(g)$ and $h \in \Omega(g)$, then $f \in O(h)$.
The Landau symbols $\mathcal{O}$, $\mathcal{o}$, $\Theta$, and $\Omega$ are transitive.
If $f(x) = O(g(x))$ and $g(x) = O(h(x))$, then $f(x) = O(h(x))$.
The Landau symbols are transitive.
If $f \in \Theta[F](g)$, then $\frac{1}{f} \in \Theta[F](\frac{1}{g})$.
If $f_1(x) \in \Theta(f_2(x))$ and $g_1(x) \in \Theta(g_2(x))$, then $\frac{f_1(x)}{g_1(x)} \in \Theta(\frac{f_2(x)}{g_2(x)})$.
If $f \in \Theta(g)$, then $f$ is eventually nonzero if and only if $g$ is eventually nonzero.
If $f$ and $g$ are functions such that $\lim_{x \to \infty} \frac{f(x)}{g(x)} = c$ and $g(x) \neq 0$ for all sufficiently large $x$, then $f \in O(g)$.
If $f(x)/g(x)$ tends to a constant $c$ as $x$ tends to infinity, and $g(x)$ is eventually nonzero, then $f(x)$ is $O(g(x))$.
If $\lim_{x \to \infty} \frac{f(x)}{g(x)} = c \neq 0$, then $f \in \Omega(g)$.
If $f(x)/g(x)$ tends to $c \neq 0$ as $x$ tends to infinity, then $f(x)$ is big-Omega of $g(x)$.
If $\lim_{x \to \infty} \frac{f(x)}{g(x)} = 0$, then $f \in \omega[F](g)$.
If $f(x)/g(x)$ tends to infinity as $x$ tends to infinity, then $f(x)$ is small-o of $g(x)$.
If $f$ is small-o of $g$ and $g$ is eventually nonzero, then $\frac{f}{g}$ tends to infinity.
If $f$ is small-o of $g$ and $g$ is eventually nonzero, then $f/g$ tends to infinity.
A function $f$ is small $\omega$ if and only if it converges to infinity with respect to the filter $F$.
If $f(x)/g(x) \to 0$ as $x \to \infty$, and $g(x) \neq 0$ for all sufficiently large $x$, then $f(x) = o(g(x))$ as $x \to \infty$.
If $f(x) = o(g(x))$, then $\frac{f(x)}{g(x)} \to 0$.
If $f(x)/g(x)$ tends to a nonzero constant $c$ as $x$ tends to infinity, then $f(x)$ is asymptotically equivalent to $g(x)$.
If $f(x)/g(x)$ tends to a nonzero constant $c$ as $x$ tends to infinity, then $f(x)$ is big-Theta of $g(x)$.
If $f_1$ converges to $a$ and $f_2$ is $o(f_1)$, then $f_1 + f_2$ converges to $a$.
If $f_1$ converges to $a$ and $f_2$ is $o(f_1)$, then $f_1 - f_2$ converges to $a$.
If $f_2$ is $o(f_1)$, then $f_1$ tends to $a$ if and only if $f_1 + f_2$ tends to $a$.
If $f_2$ is $o(f_1)$, then $f_1$ tends to $a$ if and only if $f_1 - f_2$ tends to $a$.
If $f_1(x)/g_1(x)$ tends to $a$ as $x$ tends to $x_0$, and $f_2(x)$ and $g_2(x)$ are both small compared to $f_1(x)$ and $g_1(x)$, respectively, then $(f_1(x) + f_2(x))/(g_1(x) + g_2(x))$ tends to $a$ as $x$ tends to $x_0$.
If $f(x) = O(g(x))$, then $|f(x)|^p = O(|g(x)|^p)$ for any $p \geq 0$.
If $f(x) = o(g(x))$, then $|f(x)|^p = o(|g(x)|^p)$ for any $p > 0$.
If $f(x)$ is small compared to $g(x)$ and both $f(x)$ and $g(x)$ are eventually nonnegative, then $f(x)^p$ is small compared to $g(x)^p$.
If $f$ is big-Theta of $g$, then $|f|^p$ is big-Theta of $|g|^p$.
If $f$ is $O(g)$, then $f^p$ is $O(g^p)$ for any nonnegative real number $p$.
The function $f(x) = 0$ is in the little-o of $f$.
The function $f(x) = 0$ is in $O(f)$.
If $f$ is a function, then $f \in \Omega[F](0)$.
The zero function is in the space of small-omega functions.
$f \in o[F](\lambda x. 0)$ if and only if $f(x) = 0$ for all $x$ in $F$.
A function $f$ is in $O[F](\lambda x. 0)$ if and only if $f$ is eventually zero on $F$.
A function is in $\omega[F](f)$ if and only if it is eventually zero.
A function is in $\Omega[F](f)$ if and only if it is eventually zero.
A function is in $\Theta(f)$ if and only if it is eventually equal to $0$.
$f \in \Theta[F](0)$ if and only if $f$ is eventually $0$ with respect to $F$.
If $f(x) = cg(x)$ for some constant $c$, then $f(x)$ is $O(g(x))$ if and only if $c = 0$ or $f(x)$ is $O(g(x))$.
The constant function $c$ is $O(1)$.
A constant function is big-O of another constant function if and only if the first constant is zero or the second constant is nonzero.
A constant function is big-Omega of another constant function if and only if the first constant is zero or the second constant is zero.
If $f(x)$ is $o(g(x))$ as $x \to \infty$, then $f(n)$ is $o(g(n))$ as $n \to \infty$.
If $f(x)$ is $O(g(x))$ as $x \to \infty$, then $f(x)$ is $O(g(x))$ as $x \to \infty$ for $x \in \mathbb{N}$.
If $f$ is $\omega$-bigger than $g$, then the function $x \mapsto f(x)$ is $\omega$-bigger than the function $x \mapsto g(x)$.
If $f$ is big-Omega of $g$, then the function $x \mapsto f(x)$ is big-Omega of the function $x \mapsto g(x)$.
If $f(x)$ is asymptotically equivalent to $g(x)$ as $x \to \infty$, then $f(x)$ is asymptotically equivalent to $g(x)$ as $x \to \infty$ for $x$ a natural number.
The Landau symbols $\mathcal{O}$, $\mathcal{o}$, $\Omega$, $\omega$, and $\Theta$ can be transferred from the real to the natural numbers.
If $f(x)$ and $g(x)$ are two functions such that $f(x) = g(x)$ for all $x$ sufficiently large, then the asymptotic behavior of $f(x)$ is the same as the asymptotic behavior of $g(x)$.
If $f(x)$ is a function of $x$ and $f(x) = O(g(x))$ as $x \to \infty$, then $f(x) = o(g(x))$ as $x \to \infty$.
If $f$ and $g$ are both $o(h)$, then $f + g$ and $f - g$ are also $o(h)$.
If $f(x) \in o(g(x))$ for all $x \in A$, then $\sum_{y \in A} f(y, x) \in o(g(x))$.
If $f$ and $g$ are both $O(h)$, then $f + g$ and $f - g$ are also $O(h)$.
If $f(x)$ is $O(g(x))$ for all $x \in A$, then $\sum_{y \in A} f(y, x)$ is $O(g(x))$.
If $f_1 \in \Theta(g_1)$ and $g_1(x) \neq 0$ for all sufficiently large $x$, then $(f_1 f_2) \in \Theta(g_1 g_2)$ if and only if $f_2 \in \Theta(g_2)$.
If $f_2$ is asymptotically equivalent to $g_2$ and $g_2$ is eventually nonzero, then $f_1 f_2$ is asymptotically equivalent to $g_1 g_2$ if and only if $f_1$ is asymptotically equivalent to $g_1$.
If $f_2$ is asymptotically equivalent to $g_2$ and $g_2$ is eventually nonzero, then $f_1 / f_2$ is asymptotically equivalent to $g_1 / g_2$ if and only if $f_1$ is asymptotically equivalent to $g_1$.
If $f_1$ is asymptotic to $g_1$ and $g_1$ is eventually nonzero, then $f_1/f_2$ is asymptotic to $g_1/g_2$ if and only if $1/f_2$ is asymptotic to $1/g_2$.
If $g$ is a function that grows faster than any polynomial, then $g^p$ grows faster than $g^q$ if and only if $p < q$.
If $g$ is a function that grows faster than any polynomial, then $g^p$ grows faster than $g^q$ if and only if $p \leq q$.
If $g$ is a function that grows faster than any polynomial, then $g^p$ and $g^q$ are asymptotically equivalent if and only if $p = q$.
If $f(x)$ and $g(x)$ are functions such that $\ln(f(x))$ is small-o of $\ln(g(x))$, then $f(x)^{p}$ is small-o of $g(x)^{q}$ for any $p, q > 0$.
If $f(x)$ and $g(x)$ are functions such that $\ln(f(x))$ is small-o of $\ln(g(x))$, then $g(x)^{q}$ is small-o of $f(x)^{p}$ for any $p, q < 0$.
If $f$ and $g$ are asymptotically equivalent, then $\lim_{x \to \infty} \frac{f(x)}{g(x)} = 1$.
If $f$ and $g$ are asymptotically equivalent, then the ratio $f(x)/g(x)$ tends to $1$ as $x$ tends to infinity.
$f \sim_{\mathcal{F}} g$ if and only if $f \circ h \sim_{\mathcal{F}} g \circ h$.
A function is asymptotically equivalent to itself.
If $f$ is asymptotically equivalent to $g$, then $g$ is asymptotically equivalent to $f$.
If $f$ is asymptotically equivalent to $g$, then $g$ is asymptotically equivalent to $f$.
If the ratio of two functions converges to 1, then the two functions are asymptotically equivalent.
If two functions $f_1$ and $f_2$ are asymptotically equivalent, and $g_1$ and $g_2$ are asymptotically equivalent, then $f_1$ and $g_1$ are asymptotically equivalent if and only if $f_2$ and $g_2$ are asymptotically equivalent.
If $f$ and $g$ are asymptotically equivalent, then eventually $f(x) = 0$ if and only if $g(x) = 0$.
If two functions are asymptotically equivalent, and they eventually coincide, then the functions they coincide with are asymptotically equivalent.
If two functions are asymptotically equivalent, then so are their compositions with any two functions that are eventually equal.