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1h
revised Computation of an inverse limit
deleted 526 characters in body
1d
revised For which $x\in\mathbb{R}$ is the series of general term $a_n = x^{n!}$ convergent?
added 16 characters in body; edited tags; edited title
1d
revised Show that $P(x,y)=x^6+y^6$ is reducible over $\mathbb{R}$
added 178 characters in body
2d
revised The number of $3\times 3$ nilpotent matrices over $\mathbb{F}_q$ using the Orbit-Stabilizer theorem
added 5 characters in body
May
24
revised Show that $\mathbb{C} \otimes_\mathbb{Z} \mathbb{C} \cong \mathbb{C} \otimes_\mathbb{Q} \mathbb{C}$
added 22 characters in body
May
22
revised DVR, power series expansion.
deleted 208 characters in body
May
22
revised Is $\mathbb{Q}(\pi) \cong \mathbb{Q}[[x]]/ \langle \sin(x) \rangle$?
added 5 characters in body; edited title
May
22
revised How to visualize $\mathbb{C}^2$?
added 100 characters in body
May
21
revised How to appreciate Fermat's last theorem?
added 1 character in body
May
17
revised Linear transformations with equal matrices on different bases
added 115 characters in body
May
15
revised Product of a character with an irreducible character a non-negative integer
deleted 16 characters in body
May
9
revised What is an “inner isomorphism” between different groups?
added 122 characters in body
May
7
revised The conjecture that no triangle has rational sides, medians and altitudes
added 28 characters in body; edited title
Apr
29
revised Where does this function come from in this proof?
added 294 characters in body
Apr
28
revised Understanding a very elementary property of factorials
deleted 7 characters in body
Apr
13
revised Heuristic explanation for oscillatory behavior of first $n$ primes' multiples
deleted 314 characters in body; edited tags; edited title
Apr
10
revised $a^2\equiv1 \pmod n$ iff $a\equiv\pm\,1\pmod p$ for all $p\mid n$
edited body
Jan
5
revised Hensel's lemma and roots of a polynomial mod n
edited body
Dec
22
revised tesnsor product of two copies of $\Bbb{R}$ over $\Bbb{R}$
deleted 4 characters in body
Sep
29
revised Number of congruence relations of a 4-element non-cyclic group
added 25 characters in body; edited title