# LaTeX Examples

Notation as a Tool of Thought, Figure 3.

Let be the set of primes such that , and let . Then the number of semiprimes less than or equal to is given by

Something is still amiss in the formula. For

to be true, it must be that

 k-origin indexing; k+i.n in J outer product; the dyad +/ in J the number of rows in matrix ; #M in J the number of columns in matrix ; {:\$M in J equivalent to ,B#"1 M in J equivalent to ,B#"1&|:M in J

The formula computes the diagonal of a rectangle with sides and