Napačna izbira? Nič za to! Ponujamo možnost vračila v 30 dneh
Z darilnim bonom ne morete zgrešiti. Obdarovanec lahko v zameno za darilni bon izbere karkoli iz naše ponudbe.
30 dni za vračilo blaga
This work is a supplementary material for the book Collection algebra: The formal theory of rooted tree generation and its extension to sum form equations by the same author. The main content is a list of the first 1205 collections and is intended to be an aid in solving sum form equations.