Lehner's 1949 results on the j-invariant showed high divisibility of the function's coefficients by the primes p ∈ {2, 3, 5, 7}. Expanding his results, we examine a canonical basis for the space of ...

FORTY years have elapsed since the appearance of Prof. De Morgan's “Elements of Arithmetic,” at a time when perhaps few teachers, as they submitted the rules of the science to their pupils, cared to ...