Peck, Lyman C., 1920-
Secret codes, remainder arithmetic, and matrices / Lyman C. Peck. - Reston, Virginia : National Council of Teachers of Mathematics, 1961. - 54 p. : ill.
Arithmetic.
Ciphers.
Matrices.
Secret codes, remainder arithmetic, and matrices / Lyman C. Peck. - Reston, Virginia : National Council of Teachers of Mathematics, 1961. - 54 p. : ill.
Arithmetic.
Ciphers.
Matrices.