I am reading know your weapon by haug but i have a question on the BSM that it is proposed in beggining of the paper. this is the forumla from the paper: c = Se(b−r)T*N(d1) − Xe−rT*N(d2)p = Xe−rTN(−d2) − Se(b−r)TN(−d1),whered1 = ln(S/X) + (b + σ 2/2)T / σ√T, b = cost of carry r = risk free rate. d2 = d1 − σ√TI assume this is the formula from MERTON 1973 which is the generalization of the BS formula http://www.riskglossary.com/link/merton_1973.htm According to Hull the BS formula when the stock pays a continusly compound dividend b, or q for hull ??. c = Se(-q)T*N(d1) - Xe-rT*N(d2)p = Xe-rT*N(-d2) - Se-qT*N(-d1)d1 = ln(S/X) + (r-q + V^2/2)T / V*sqrt(T)are these formulas equivalent ??.................why does haug on the d1 formula use b instead of r-q. and in the S on the formula uses b-r instead of q ?Any help will be greatly welcome !!!

sorry i was making a mistake. Not simplyfing !!!sorry !!