The Journal of the Indian Mathematical Society

B. Ramamurti ¹

Affiliations
1 Annamalai University, IN

Abstract

In a paper published in the Journal of the London Math, Soc. 7 (1926) pp 86-93, Dr. Marr has shown that given six points on a conic there are ten points P such that the lines joining P to the six points touch a cubic curve at these six points. Recently in an additional note be has shown that these points form a Desatgues configuration He has not stated that this configuration is self-polar with respect to the conic, though this follows from his proof.

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B. Ramamurti ¹

Affiliations
1 Annamalai University, IN

Abstract

The lines of a linear complex L in [n] which lie in a sub-space [r] form a linear complex in that sub-space, which may be denoted by L_[r]. If L_[r] has at least one singular point, then it is said to be null-variant.

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R. Vaidyanathaswamy , B. Ramamurti

Abstract

In the paper 'On the rational norm curve II', a one-to-one correspondence has been effected between quadric envelopes Q in a space S_n of n dimensions and linear line complexes L in a space of S_n+1 of (n+1) dimensions in the following manner. Any simplex inscribed in a rational norm curve R_n in S_n may be specified by the binary (n+1)-ic, a_x^n+x, giving the parameters of its vertices.

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