If the restriction of `F` to the axis `X_t` has order `d`, then `ℓ(k⟦T, X⟧ ⧸ (F, X_s)) = d`.

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If the restriction of `F` to the axis `X_t` has order `d`, then `ℓ(k⟦T, X⟧ ⧸ (F, X_s)) = d`. · Prove2Me