paragraph_text: (i) <math> r\triangleright (s\triangleright m)= (r\cdot s)\triangleright m</math> (aksiom lijevog djelovanja) (ii) <math> (r+s)\triangleright m = r\triangleright m + s\triangleright m</math> (aditivnost u R) (iii) <math> r\triangleright (m+m') = r\triangleright m + r\triangleright m'</math> (aditivnost u M) (iv) <math> 1_R\triangleright m = m</math> (unitalnost djelovanja)