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Geometry: Euclid and Beyond Robin Hartshorne
Publisher: Springer

Hartshorne, Robin; Geometry: Euclid and Beyond. Coxeter; Elements - Euclid; Geometry, Euclid and Beyond - Robin Hartshorne. Hartshorne, Robin, Geometry: Euclid and Beyond, 2010 154. Ghorpade, Sudhir R., Limaye, Balmohan V., A Course in Multivariable Calculus and Analysis, 2010 153. Geometry: Geometry Revisited - H.S.M. Musili 1970 Springer ISBN13:9783540051848;ISBN10:3540051848. Greitzer; Introduction to Geometry - H.S.M. Geometry.Euclid.and.Beyond.pdf. Ample Subvarieties of Algebraic Varieties Lecture Notes in Mathematics Robin Hartshorne, C. Springer, 2000; ISBN 0 387 98650 2. Ŝ�《幾何學：歐幾里得及其進一步發展》(Geometry: Euclid and Beyond) 一書中，作者Robin Hartshorne在導論章第１節中，提問“What exactly is a proof?” (p.10)，然後，提出他自己的答案(pp. [euclidean & noneuclidean geometry; 3 feb 2008]. A fairly wide-ranging text, upper-division mathematics.