Robuta

https://annals.math.princeton.edu/1969/89-2/p02 Vector bundles over affine surfaces birationally equivalent to a ruled surface | Annals of... vector bundles birationally equivalent ruled surface affine surfaces https://community.wolfram.com/t/ruled-surface-the-cone-defined-by-y-2-4xz-0/26470 Ruled surface: the cone defined by y^2 − 4xz = 0 - Ideas - WOLFRAM COMMUNITY Feb 15, 2026 - It is shown that the given equation represents a conical surface demonstrating that its geometric locus is a ruled surface whose generatrix are all... ruled surface the cone defined ideas wolfram https://projectif.org/work/ruled-surface-aggregations Ruled Surface Aggregations — project:if ruled surface aggregations project https://experts.umn.edu/en/publications/counting-curves-on-elliptic-ruled-surface/fingerprints/ Counting curves on elliptic ruled surface - Fingerprint - Experts@Minnesota ruled surface counting curves elliptic fingerprint