a. Math. [f. name of Karl W. Weierstrass (1815–97), an eminent German mathematician + -(I)AN.] Pertaining to or invented by Weierstrass, esp. Weierstrassian function.
1878. Cayley, Math. Papers (1896), X. 434. We have thus in all 21 equations which exhibit the form of the Weierstrassian functions al (u, v, w)12. …, al(u, v, w)67.
1884. Daniels, in Amer. Jrnl. Math., VI. 256. The Weierstrassian proof of this … is as follows.
1901. Osgood, in Ann. Math., Ser. II. II. 122. The Weierstrassian function C.
