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ERIC Number: EJ886048
Record Type: Journal
Publication Date: 2010-May
Pages: 2
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0746-8342
Characterization of a Quadratic Function in Rn
Xu, Conway
College Mathematics Journal, v41 n3 p212-213 May 2010
It is proved that a scalar-valued function "f"(x) defined in "n"-dimensional space must be quadratic, if the intersection of tangent planes at x[subscript 1] and x[subscript 2] always contains the midpoint of the line joining x[subscript 1] and x[subscript 2]. This is the converse of a result of Stenlund proved in this JOURNAL in 2001.
Mathematical Association of America. 1529 Eighteenth Street NW, Washington, DC 20036. Tel: 800-741-9415; Tel: 202-387-5200; Fax: 202-387-1208; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A