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Linear Algebra and its Applications | 1978

On sums of squares

Anneli Lax; Peter D. Lax

Abstract We show that the fourth order form in five variables, ∑ i=1 5 ∏ i=≠i (x i −x i ) , is nonnegative, but cannot be written as a sum of squares of quadratic forms.


PRIMUS | 1994

TRYING EVERYTHING IN A PRECALCULUS COURSE

Dale L. Brekke; Anneli Lax

ABSTRACT A special section of a precalculus course at NYU offered the opportunity to try a large number of teaching methods in addition to the traditional lecture. The methods are described, and the results are reported.


American Mathematical Monthly | 1986

Award for Distinguished Service to Professor Arnold Ephraim Ross

Anneli Lax; Alan Woods

(1986). Award for Distinguished Service to Professor Arnold Ephraim Ross. The American Mathematical Monthly: Vol. 93, No. 4, pp. 245-246.


Communications on Pure and Applied Mathematics | 1956

On cauchy's problem for partial differential equations with multiple characteristics

Anneli Lax


Archive | 1976

Calculus with applications and computing

Peter D. Lax; Samuel Burstein; Anneli Lax


Communications on Pure and Applied Mathematics | 1948

Decaying shocks. A comparison of an approximate analytic solution with a finite difference method

Anneli Lax


Communications on Pure and Applied Mathematics | 1991

From one editor to another

Anneli Lax


Archive | 1976

Growth and decay

Peter D. Lax; Samuel Burstein; Anneli Lax


Archive | 1976

Rotation and the trigonometric functions

Peter D. Lax; Samuel Burstein; Anneli Lax


Archive | 1976

Population dynamics and chemical reactions

Peter D. Lax; Samuel Burstein; Anneli Lax

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