[vahy-er-strahs, -shtrahs; Ger. vahy-uh
r-shtrahs] 
| Karl The⋅o⋅dor [kahrl tey-oh-dawr] , 1815–97, German mathematician. |
| Wei·er·strass (vī'ər-sträs' -shträs') German mathematician. Noted for his contributions to real and complex analysis, he was the first to construct an example of a continuous function that could not be differentiated anywhere. |