`ℓ(k⟦T, X⟧ ⧸ (F, X_s)) = c` iff the restriction of `F` to the other axis `X_t` has order exactly `c`.

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`ℓ(k⟦T, X⟧ ⧸ (F, X_s)) = c` iff the restriction of `F` to the other axis `X_t` has order exactly `c`. · Prove2Me