473 reputation
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location Canada
age 37
visits member for 3 years, 2 months
seen Apr 14 at 16:15

To see Latex in chat: go to http://www.math.ucla.edu/~robjohn/math/mathjax.html Click on bookmark every time I enter the Chat


Mar
17
revised Show: grad f (x + y) = grad f (x) + grad f (y)
deleted superfluous and extra stuff
Mar
17
suggested suggested edit on Show: grad f (x + y) = grad f (x) + grad f (y)
Mar
17
reviewed Reviewed Show: grad f (x + y) = grad f (x) + grad f (y)
Mar
17
comment Show: grad f (x + y) = grad f (x) + grad f (y)
saying x,y are in $R^2$ already implies x,y (hence x+y) are in the domain of $f$ and $g$.
Mar
17
revised What is the relation between $I_2(ℝ)$ and $GL_2(ℝ)$?
changed Latex writing
Mar
17
suggested suggested edit on What is the relation between $I_2(ℝ)$ and $GL_2(ℝ)$?
Mar
16
reviewed No Action Needed Prove that $\mathcal{P}(A)⊆ \mathcal{P}(B)$ if and only if $A⊆B$.
Mar
16
reviewed No Action Needed Is there an intuitive non-mathematical way to show $\sum_n 1/n=\infty$?
Mar
16
reviewed No Action Needed Football League coincidence
Mar
16
reviewed No Action Needed Probability of collision in S-box
Mar
16
reviewed Reviewed Math vs Probability vs Statistics
Mar
16
reviewed No Action Needed Area of a parallelogram, vertices $(-1,-1), (4,1), (5,3), (10,5)$.
Mar
16
awarded  Custodian
Mar
16
reviewed No Action Needed Application of prime number theorem
Mar
16
reviewed No Action Needed If $A$ is a set, then $\mathrm{card}(P(A)) = 2^{\mathrm{card} A}$.
Mar
15
awarded  Organizer
Mar
15
revised Converting Prime Numbers from Base $10$ to Base $4$
a better writing and formatting, added new tag
Mar
15
reviewed Reviewed Converting Prime Numbers from Base $10$ to Base $4$
Mar
15
suggested suggested edit on Converting Prime Numbers from Base $10$ to Base $4$
Mar
14
comment Determining the dimensions of the null space and column space of a matrix
"use this to find rank A" can it get more simpler than that?