It makes sense to treat ∞ ≡ 1:0 as a “number” in the context of projective geometry, the Riemann sphere, etc. The quarrel Wildberger has is not with the propor

It makes sense to treat ∞ ≡ 1:0 as a “number” in the context of projective geometry, the Riemann sphere, etc. The quarrel Wildberger has is not with the proportion 1:0, but with the concept of a limit.