Corrections on some books
- Some corrections on the book "R. A. Brualdi, Introductory Combinatorics, 5th ed., Pearson, 2009". (https://www.math.wisc.edu/~brualdi/5thed_corrs.pdf).
- Some corrections on the book "V. Kac, P. Cheung, Quantum Calculus, Springer-Verlag, 2002". (http://www-math.mit.edu/~kac/index.html).