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Shuffling things up: Applying Group Theory in Advent of Codein #haskell, #advent of code, #abstract algebra, #group theory, @Haskell, +Advent of Code

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Adjunctions in the wild: foldlin #haskell, #category theory, @Haskell

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Applicative Regular Expressions using the Free Alternativein #haskell, #parsers, #functor combinators, @Haskell

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Shifting the Stars: Advent of Code with Galilean Optimizationin #advent of code, #linear algebra, #physics, +Advent of Code

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Alchemical Groups: Advent of Code with Free Groups and Group Homomorphismsin #haskell, #advent of code, #abstract algebra, #group theory, @Haskell, +Advent of Code

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You Could Have Invented Matrices!in #linear algebra