• MBM@lemmings.world
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    4 days ago

    Unless you know algebraic topology it’s kind of hopeless (but that’s the joke). If you’re curious, it’s the first example on the page on cohomology rings.
    Edit: So, you could say H(🌭;🍔) = 🍔[🥚] / (🥚n+1) where |🥚| = 1.