Good books/resources on algorithms

[amishera]

Hi,

I have some books like:

concrete mathematics
art of programming
computer algorithms
introduction to algorithms

But I was looking for some more books covering algorithms on number theory, combinatorics, computation geometry etc. Can you suggest some good books/materials on these topics.

Thanks.

[slxst]

I enjoy algorithms in a nutshell

[amishera]

I have got some more. You know what, do you think if any one asks for help with the same question I should share my knowledge? I don't think so. Because you made me go through the hard times. You acted like snobs.