Dear GHC developers, There is a computer algebra library called DoCon and written in Haskell (+GHC). And I am considering the possibility to extend it with many new methods by joining some open libraries written in C, C++, and in Gnu Common Lisp (GCL). 1. I have seen somewhere the announcement of the C library for numbers, algebraic numbers by Lenstra and may be, others. Is it real to design its interface to a Haskell program (DoCon), may be, by using some tools from GHC ? (which tools?) 2. There exists a great volum of math libraries written in Lisp-s, in particular, in GCL. I believe some of them have a free enough license. But how to interface to them? For example, is there possible an interpreter for GCL written in C ? If it is, then, may be, the GCL libraries can be interfaced by joining and applying this interpreter at the C data level? Also I have looked in the GCL page, and it was not clear where to ask about such GCL interpreter. I never tried these interface tricks and never looked into the Lisp design. Thank you in advance for your advice. ----------------- Serge Mechveliani mechvel@botik.ru