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- Jin-Hui Fang, Yong-Gao Chen
- Discrete Applied Mathematics
- 2008

It is conjectured by Erdős, Graham and Spencer that if 1 ≤ a1 ≤ a2 ≤ · · · ≤ as are integers with ∑s i=1 1/ai < n − 1/30, then this sum can be decomposed into n parts so that all partial sums are ≤ 1. This is not true for ∑s i=1 1/ai = n − 1/30 as shown by a1 = · · · = an−2 = 1, an−1 = 2, an = an+1 = 3, an+2 = · · · = an+5 = 5. In 1997 Sandor proved that… (More)

- Jin-Hui Fang, Yong-Gao Chen
- Discrete Mathematics
- 2013

- Jin-Hui Fang
- Combinatorica
- 2011

- Yong-Gao Chen, Jin-Hui Fang
- Eur. J. Comb.
- 2014

Human embryonic stem cells (hESCs) are promising in regenerative medicine. Although several hESC-based clinical trials are under way, a widely accepted standard of clinical-grade cells remains obscure. To attain a completely xeno-free clinical-grade cell line, the system must be free of xenogenic components, the cells must have a comprehensive set of… (More)

- Yong-Gao Chen, Jin-Hui Fang
- Combinatorica
- 2011

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