A note on Zhona's inverse theorem
On Holditch and Liouville theorems
Matrix transformations of some sequence spaces over N on -A Rchimedi an fields
On the rectilinear congruences generated by the instantaneous screwing axes connected with a surface
k - Convexity in euclidean 3 - space
On the (f, g) - linear connections
On p - valent functions with negative and missing coefficients