| Jul 29, 2024 | Grey Cat The Flags 2024 Finals, Crypto writeups
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| Jul 2, 2024 | Microcorruption solutions: Hollywood
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| Apr 24, 2024 | Grey Cat The Flags 2024 Qualifiers writeups
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| Mar 16, 2024 | Crypto solutions for Hackbash 2024
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| Mar 1, 2024 | A summation identity, via Laurent expansion
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| Dec 30, 2023 | An interesting result on the entries of a matrix inverse
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| Mar 10, 2023 | Expressing $\cos(2\pi/n)$ in radicals
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| Mar 10, 2023 | Solvability by radicals and principal roots
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| Feb 7, 2023 | The extension $\C(t^n,u^n)/\C(t,u)$, where $t^2+u^2=1$
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| Feb 5, 2023 | A result of Galois on prime degree polynomials
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| Feb 5, 2023 | Casus irreducibilis for cubic polynomials
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| Feb 4, 2023 | An alternative discriminant
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| Jan 25, 2023 | Normalised root towers for solvable extensions of $\Q$
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| Jan 25, 2023 | Nilpotent groups and central series
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| Jan 25, 2023 | The Galois group of $x^p-a$
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| Jan 25, 2023 | Separability and polynomials over char $p$
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| Jan 6, 2023 | Real Jordan form and complexification
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| Jan 4, 2023 | Studying linear maps through $F[\l]$-modules
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| Dec 30, 2022 | Generating finite rings
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| Dec 25, 2022 | Characterising submodules of finitely generated torsion modules over a PID
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| Dec 24, 2022 | Characterising quotients of finitely generated torsion modules over a PID
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| Dec 24, 2022 | Visualising Smith normal form on $\Z^2$
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| Oct 6, 2022 | Why quaternion multiplication resembles the cross product
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| Oct 3, 2022 | A very easy way to remember the Chinese Remainder Theorem
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| Jul 16, 2022 | Defining smooth manifolds
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| Jul 11, 2022 | Computing pullbacks of $k$-forms over $k$-chains
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| Jul 10, 2022 | A simpler way of solving linear recurrences
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| Jul 9, 2022 | A small gripe on Zorn's lemma
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| Mar 20, 2022 | Boolean rings
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| Feb 20, 2022 | The subtheory $PA^-$
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| Feb 19, 2022 | Some remarks on $\Th\N$
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| Jan 2, 2022 | Equivalence of filter and cover compactness
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| Dec 30, 2021 | $\ZZs{p^n}$ is cyclic
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| Nov 7, 2021 | Certain maximal subgroups of $S_n$
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| Jun 22, 2021 | Deriving $\Aut(Q_8)$
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