Variable. Mathematical term,
Hobson, Ernest William, 1856- *F 5123.86 The theory of functions of a real variable and the theory of Fourier’s series. 2d edition. Revised throughout and enlarged. By E. W. Hobson. — Cambridge [England]. The University Press. 1921. 2 y. 26 cm., in 8s.
 
This card was printed at the Boston & Public Library, Ncwember 22, 1927. N3055 — Functions. Theory. . Mathematical term. — Fourier's
theorem.