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9h
reviewed Leave Closed Fundamental group of some disk quotient
2d
reviewed Leave Closed linear programing problem
2d
reviewed Leave Closed Basis of $\mathbf{Q}[x]$
Sep
19
revised Is Pythagoras the only relation to hold between $\cos$ and $\sin$?
added 2 characters in body
Sep
19
answered Is Pythagoras the only relation to hold between $\cos$ and $\sin$?
Sep
18
reviewed Leave Closed Normal distrubition
Sep
18
reviewed Reopen Simplifying an expression written as the sum of three fractions
Sep
18
reviewed Leave Closed Give the parity check matrix H of a binary Hamming code of length 15.
Sep
15
answered How amount of Emirp Primes depends on the base of numeral system
Sep
14
reviewed Reopen Brownian motion - Hölder continuity
Sep
14
reviewed Reopen An observation regarding Andrica' Conjecture.
Sep
13
answered How to find the number of semitones between two frequencies?
Sep
12
comment “two sets differ” in vs by “exactly 1 element”, in both cases is symmetric implied?
I think it depends heavily on context. Two bases for a finite-dimensional vector space that "differ by exactly one element" are necessarily like your $A$ and $B$; two subsets of a finite set that "differ by exactly one element" are more likely to be like $A$ and $D$.
Sep
12
reviewed Leave Closed Area of the field that the cow can graze.
Sep
12
reviewed Leave Closed Cardinality of ring having more than one left inverse for some element!
Sep
11
answered Trivial line bundle
Sep
9
comment Proving $\arg(zw)=\arg(z)+\arg(w)$
@Winther: Presumably because it makes the statement true? (If you define $\operatorname{arg}(z)$ to be the set of all possible arguments of $z$.)
Sep
8
reviewed Leave Closed Given roots on the unit circle, find the complex reciprocal polynomial
Sep
8
comment Question on algebraic equation
Completeness would require an argument that $a$, $b$, $-c$, $-d$ are actually distinct, but I don't think that's hard...
Sep
8
reviewed Leave Closed An observation regarding Andrica' Conjecture.