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Jun
17
reviewed Edit suggested edit on Why does this theorem fail for arbitrarily large n?
Jun
17
revised Why does this theorem fail for arbitrarily large n?
Extended suggested edit to include the bottom half of the second image
Jun
17
reviewed Reject suggested edit on isomorphism of $Q[x]/(x^2-3x + 2)$ and the ring, former by pairs $(a,b)$ with component addition and multiplication
Jun
17
comment Inverse of a polynomial function
What you effectively want to do is to solve the cubic $x^3 - 3x^2 + 4y = 0$ for values of $y \in [0\ldots 2]$. The tricky bit is that the range of $x$ specified is precisely that range for which there are three real roots, so you have to select the correct one.
Jun
17
reviewed Leave Open Jordan blocks and the characteristic polynomial.
Jun
17
answered multiplication in GF(256) (AES algorithm)
Jun
17
comment multiplication in GF(256) (AES algorithm)
I wanted to tidy up the chain of computation, but I couldn't understand what you were doing, so I've just added $ symbols to invoke $\LaTeX$ markup.
Jun
17
revised multiplication in GF(256) (AES algorithm)
Add some $ signs and make some linguistic tweaks
Jun
15
reviewed Close Image in abelian categories
Jun
15
reviewed Close When is a combinations of subrings a subring?
Jun
13
reviewed Close Introductory books on complex analysis?
Jun
13
reviewed Leave Open General term for the given sequence
Jun
12
reviewed Approve suggested edit on problem concerning continuity of functions
Jun
12
answered Probability of 7 white chessboard squares without neighbours
Jun
12
comment Probability of 7 white chessboard squares without neighbours
I assume that the black squares are selected uniformly, but are you looking for the probability that at least 7 white squares are isolated, or that exactly 7 white squares are isolated?
Jun
12
revised Probability of 7 white chessboard squares without neighbours
Rewrite as sentences
Jun
10
reviewed Close How to show $d(x,A)=0$ iff $x$ is in the closure of $A$?
Jun
7
comment What do the vectors $ (1, 0, 0), (0, 1, 0), (0, 0, 1)$ correspond to geometrically?
And they're also normal, so they're an orthonormal basis.
Jun
7
comment How many different Shidoku Boards are there?
+1 Nice approach.
Jun
7
answered How many different Shidoku Boards are there?