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Displaying 1051 - 1060 of 1214
A row (column) of a matrix is called “extraneous” if it is a linear combination of the other rows (columns). The author shows that deleting an extraneous row or column of a...
A new and elementary proof for a theorem in differential equations
The author explores the relationship between saddle points of surfaces and the inflection points of the projected curves.
Analytic proofs for the generation of conic sections
The author presents a simple proof of a special case of Dirichlet`s celebrated theorem on primes in arithmetic progressions.
An arctangent identity is presented visually.
Bernoulli`s inequality is presented visually.