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Mathematics

Excavator

 Excavator
Edit first post that was inactive for 6 months.
Awarded 11080 times.
How to read FSM diagram? It is a machine for calculating if a binary number is divisible by 5
Awarded Oct 13 at 4:41
Why do we refer to Lyapunov exponents as a characteristic of the system, telling us about its chaoticity, when it is only referred to a point?
Awarded Oct 12 at 4:22
What's an example of a discontinuous linear functional from $\ell^2$ to $\mathbb{R}$?
Awarded Oct 11 at 5:34
Prove $\left\|x\right\|_2\leq\sqrt{n}\left\|x\right\|_\infty$
Awarded Oct 7 at 4:26
Ito integral of sign of Brownian motion is a Brownian motion [duplicate]
Awarded Oct 6 at 5:53
The diameter of a convex hull.
Awarded Oct 5 at 5:07
how to sum the divisors of N mod K if all I have is N mod K?
Awarded Oct 5 at 5:07
Intuitive derivation of Rodrigues formula for Legendre polynomials
Awarded Oct 5 at 5:07
On Groups of Order 315 with a unique sylow 3-subgroup .
Awarded Oct 3 at 4:33
When a full subcategory of abelian category is abelian
Awarded Sep 30 at 6:05
On volume forms and norms on exterior powers
Awarded Sep 25 at 4:32
Understanding Conditional Mutual Information
Awarded Sep 24 at 4:23
Can an equation be represented by more than one graph of different dimensions
Awarded Sep 23 at 4:42
Pushout in the category of Sets: proof
Awarded Sep 22 at 22:56
Why would I want to multiply two polynomials?
Awarded Sep 21 at 4:40
Proving the existence of simple graph that has two vertices of same degree while other vertices degrees are different.
Awarded Sep 19 at 4:16
proof that rank$(A+B+AB) \le $rank$(A) + $rank$(B)$ when $A,B$ are square matrices
Awarded Sep 19 at 4:16
The law of the unconscious statistician
Awarded Sep 19 at 4:16
Expected Value of Sample Variance
Awarded Sep 18 at 5:16
How can you divine (the trick of) multiplying both sides by $T - \lambda_k I$?
Awarded Sep 17 at 4:08
Prove that divisibility between two natural numbers is not definable in arithmetic
Awarded Sep 15 at 4:05
Show that a positive operator is also hermitian
Awarded Sep 15 at 4:05
Show that if $\gcd(a, b) = 1$ then $\forall n, n > ab~\exists \ x,y \in \mathbb{N} : n = ax + by$.
Awarded Sep 14 at 4:25
Differentiation of norm
Awarded Sep 13 at 4:41
Proof by Strong Induction (solution of linear recurrence)
Awarded Sep 12 at 17:34
Reduced chi-square and confidence interval
Awarded Sep 11 at 13:32
Integration by parts: $x f(x) dx$
Awarded Sep 11 at 4:09
Solve Diophantine equation: $2^x=5^y+3$ for non-negative integers $x,y$.
Awarded Sep 10 at 4:03
Why are the formulae related to circular permutations different?
Awarded Sep 9 at 4:42
Some questions on abelian category
Awarded Sep 8 at 5:31
Non Linear non homogenous Partial Differential Equation boundary value problem
Awarded Sep 7 at 4:01
Proof for Strong Induction Principle
Awarded Sep 6 at 5:07
How to prove $\operatorname{Tr}(AB) = \operatorname{Tr}(BA)$?
Awarded Sep 6 at 5:07
What is the definition of differentiation in normed space?
Awarded Sep 5 at 4:27
$\mathbb{R}^3 \setminus A$ deformation retracts onto $S^1 \vee S^2$
Awarded Sep 4 at 4:18
uncountable families of measurable sets, in particular balls
Awarded Sep 2 at 4:12
Existence of $n$ distinct (real) roots of an orthogonal polynomial
Awarded Sep 1 at 5:24
Intuition for cross product of vector with itself and vector with zero vector
Awarded Aug 30 at 13:31
Do opposite categories always exist?
Awarded Aug 29 at 5:15
Determination of a Joukowski airfoil chord (demonstration)
Awarded Aug 29 at 5:15
Help with Borel Cantelli lemma
Awarded Aug 29 at 5:15
If $f$ is of given parity, what can be said of its derivative and primitive?
Awarded Aug 29 at 5:15
Do harmonic maps into spaces of negative curvature locally minimize energy?
Awarded Aug 28 at 6:42
Lipschitz function and Hausdorff distance
Awarded Aug 28 at 6:42
Product rule, help me understand this proof
Awarded Aug 28 at 6:42
In classical logic, why is $(p\Rightarrow q)$ True if $p$ is False and $q$ is True?
Awarded Aug 23 at 19:09
An example of a norm which can't be generated by an inner product
Awarded Aug 21 at 5:34
Conjugacy Classes of $D_{12}$
Awarded Aug 17 at 21:23
How to derive the expected value of even powers of a standard normal random variable?
Awarded Aug 17 at 4:12
Is product of locally compact spaces always locally compact?
Awarded Aug 17 at 4:12
Prove that $\frac{ab}{a^5+b^5+ab}+\frac{bc}{b^5+c^5+bc}+\frac{ca}{c^5+a^5+ca} \leq 1.$
Awarded Aug 15 at 4:45
How to integrate $(x^2 - y^2) / (x^2 + y^2)^2$
Awarded Aug 14 at 4:35
Why is Euler's Totient function always even?
Awarded Aug 14 at 4:35
Find all polynomials such that $f(x)$ divides $f(2x^3+x)$
Awarded Aug 11 at 14:07
Understanding the homotopy extension property
Awarded Aug 11 at 4:16
What is a left-invariant vector field on a Lie Group G? [closed]
Awarded Aug 9 at 4:07
If $abc=1$ so $\sum\limits_{cyc}\frac{a}{\sqrt{a+b^2}}\geq\frac{3}{\sqrt2}$
Awarded Aug 9 at 3:46
What situations should $\oint$ be used?
Awarded Aug 8 at 5:47
Arranging a set of strings to form a palindrome: NP complete?
Awarded Aug 8 at 5:47
Prove that the absolute value of a holomorphic function is greater than the absolute value of one of its coefficients for some given value.
Awarded Aug 7 at 4:30
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