In article <DzJv9L.DLI@cwi.nl>, email@example.com (Dik T. Winter) wrote: > > In article <firstname.lastname@example.org> email@example.com (Tleko) writes: > > In article <DzE9qr.8Iz@cwi.nl>, Dik T. Winter wrote: > ... > > >Your mathematics are a tad bit different. > > > > Indeed. > > But, if you agree that you are not using standard mathematics but something > different (Tleko mathematics) why do you not say so? And you ought to have > given definitions etc. in Tleko mathematics because now we have no idea > what you are talking about.
He did. With z = x+iy, I think he defined df(z)/dz = lim(f((x+h)+i(y+k))-f(x+iy))/(h+ik)) if y >= 0. For y < 0 he changed the sign of the k in the denominator. Whether such a definition is useful I reserve judgement upon.
Terry Moore, Statistics Department, Massey University, New Zealand.
Imagine a person with a gift of ridicule [He might say] First that a negative quantity has no logarithm; secondly that a negative quantity has no square root; thirdly that the first non-existent is to the second as the circumference of a circle is to the diameter. Augustus de Morgan