Chuang Chi-tai

Chuang Chi-tai (also Zhuang Qitai; born March 13, 1909 in Juxian , Shandong , † September 2, 1998 in Beijing ) was a Chinese mathematician .

Chuang Chi-tai studied at Tsinghua University , among others with Hiong King-lai . From 1936 to 1939 he was in Paris , where he did his doctorate under Georges Valiron . He then returned to China and was a professor at Yunnan University . From 1946 he was then a professor at Peking University .

Chuang worked mainly in the field of function theory , in particular Nevanlinnaschen's value distribution theory . A problem posed by Nevanlinna here was whether the second law of the Nevanlinna theory remains correct even if the constants occurring there are replaced by functions that grow more slowly than the function under consideration . In 1964, Chuang was able to show that this applies to entire functions . For meromorphes this was only shown by Steinmetz in 1986. A well-known estimate of the Nevanlinna characteristic of a meromorphic function by its derivation goes back to Chuang. Other topics he dealt with were normal families , Julia and Borel directions, and differential polynomials . ${\displaystyle a_{1},\dots ,a_{q}}$ ${\displaystyle f}$ ${\displaystyle f}$ ${\displaystyle f}$

literature

• Wen, Guo Chun; Hua, Xin Hou: Academic contribution of Professor Chi Tai Chuang . Complex Variables: Theory and Application. Volume 43, Issue 3-4 (2001), pp. 211-223. (Special issue in honor of Chuang)
• Yang Lo : In memoriam: Professor Chi-Tai Chuang (Chinese). Advances in Mathematics (China), Volume 28 (1999), Issue 4, pp. 361-364.

Individual evidence

1. ↑ Dissertation Étude sur les familles normales et les familles quasi-normales de fonctions méromorphes , digitized on Numdam
2. ↑ Norbert Steinmetz: A generalization of the second Nevanlinnaschen law . Journal for pure and applied mathematics, Volume 368 (1986), pp. 134-141.