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  • 166 votes cast
Jul
27
awarded  Nice Question
Jun
13
asked Representation of linear transformation of matrices
Jun
3
accepted When two theorems are equivalent? [Formal definition]
May
29
awarded  Yearling
May
29
answered Evaluating $\int_{-\infty}^{\infty}e^{-x^2}dx$ using polar coordinates.
May
24
comment When two theorems are equivalent? [Formal definition]
@GregoryGrant: I mean, how can we describe mathematically that Theorem 1 and Theorem 2 are equivalent in a "formal" way, not "in words".
May
24
asked When two theorems are equivalent? [Formal definition]
Apr
17
asked Understanding and teaching the concept of derivative
Dec
14
awarded  Caucus
Sep
13
revised Number of partitions of number n and number 3n
added 265 characters in body
Sep
12
revised Number of partitions of number n and number 3n
added 221 characters in body
Sep
12
answered Number of partitions of number n and number 3n
Jul
28
awarded  Necromancer
Jul
2
awarded  Curious
Jun
15
comment What is the probability that all 4 cards have different value?
IMO the approach and the result are correct.
May
31
answered How many $3$-Letter Strings from come from $ABRACADABRA$?
May
31
comment How many $3$-Letter Strings from come from $ABRACADABRA$?
I've got only 97 strings ...
May
6
comment fixed point iteration $x_{k+1}=f(x_k)$ with multiple fixed points
Why is $f(0)=0$?
May
4
asked Practical use and applications of improper integrals
Apr
27
awarded  Custodian