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Now is the time for all good men to do mathematics. Work, work, work more. Count, add, subtract, and more. MathDL now is MAAs pathway within the National Science Digital Library. Other features...

*The author presents a geometric proof for the sum of a geometric series by using similar triangles.*

If \(s_n\) is the product of the entries in the \(n\)th row of Pascal's Triangle and \(r_n = s_n/s_{n-1}\), then a proof is given of the fact that \( \lim_{n \rightarrow \infty} r_n/r_{n-1} =...

Capsules on sequences and series

*An algorithm, with examples, for multiplying by \(m\) modulo \( \)n without actually carrying out the multiplications in ordinary arithmetic*

*Gaussian Integer solutions to the Pythagorean Triplet equation are investigated. The paper was `inspired by undergraduates, and is accessible to them`.*