Haim Hanani
Haim Hanani (Chaim Chojnacki) | |
|---|---|
חיים חנני | |
| Born | 11 September 1912 |
| Died | 8 April 1991 (aged 78) |
| Alma mater | Hebrew University |
| Scientific career | |
| Fields | Mathematics |
| Thesis | A contribution to the four color problem (1938) |
Haim Hanani (Hebrew: חיים חנני; 11 September 1912 as Chaim Chojnacki– 8 April 1991) was a Polish-born Israeli mathematician, known for his contributions to combinatorial design theory, in particular for the theory of pairwise balanced designs and for the proof of an existence theorem for Steiner quadruple systems. He is also known for the Hanani–Tutte theorem on odd crossings in non-planar graphs.