On flat extensions of a ring
Subtitle: On ruled surfaces
By: by Masayoshi Nagata.
Contributors: Université de Montréal. Département de mathématiques.
Series: Séminaire de mathématiques supérieures -- 46
Publisher: Presses del'Université de Montréal
Published: 1971
Place of publication: Montréal
Language: eng
Number of pages: 52
Subjects: Rings (Algebra); Surfaces, Algebraic.