Humor gráfico: I have problems

- Houston, tengo problemas. (El libro se llama "Los problemas de Hilbert")

Los problemas de Hilbert son veintitrés problemas en matemáticas publicados por el matemático alemán David Hilbert en 1900. Los problemas estaban todos sin resolver en ese momento, y varios de ellos fueron muy influyentes para las matemáticas del siglo XX.

- Houston, I have problems. (The name of the book is "Hilbert's Problems")

Hilbert's problems are twenty-three problems in mathematics published by German mathematician David Hilbert in 1900. The problems were all unsolved at the time, and several of them were very influential for 20th-century mathematics.