Resolution of the (2,5) cusp by two blowups

ID: resolution-of-the-2-5-cusp-by-two-blowups

Blow up the origin and use the chart , giving the strict transform . Blow up its remaining singular point and use , giving , which is smooth because its derivative in is . The complementary chart at each stage has no point of the strict transform on its exceptional divisor. These two blowups of a smooth algebraic surface resolve the branch, although the smooth transform is still tangent to an exceptional divisor.

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