A note on the unit group of $ZS_4$
Lie algebras with solvable word problem
Transcendence problems connected with Drinfelʹd modules
Some remarks on Jacobian problem
A note on the use of generalized inverse of matrices in statistics
Presentation of knot groups and their subgroups
Some old and recent arithmetical results concerning modular forms and related zeta functions
Some criterions for the class number of a real quadratic field of R-D type to be one