I Added Matrix Market reader that converts Netlib .mm files to HPolytope

[DhanushShetty18]

A converter that reads Matrix Market
format files and produces volesti-ready HPolytope objects.

Deliverables:
include/misc/matrix_market_reader.h:
1- read_matrix_market(): reads sparse .mm format into dense
Eigen matrix, handles % comment lines and 1-indexed triplets
2- matrix_market_to_hpolytope(): converts constraint matrix

• bounds file into HPolytope(dim, A, b)

• appends variable bound constraints as additional inequality rows

test/test_matrix_market_reader.cpp:

• Tests on real Netlib degen2 problem (758 variables, 444 constraints)
• Verifies dimension and constraint count after conversion

Test outputs
Dimension: 758
Constraints: 1201 (444 original + 757 bound rows)
1 passed | 0 failed | Status: SUCCESS

Netlib LP benchmark problems are a standard dataset for evaluating
LP solvers but are not directly loadable into volesti. This converter
bridges that gap — researchers can now go from a raw .mm file to a
volesti sampling/volume pipeline in one function call.

GSOC 2026 project: Benchmark Polytope Import Suite
Dhanush Shetty

[DhanushShetty18]

Hi @vissarion — I have submitted my GSOC 2026 proposal for the Benchmark Polytope Import Suite. Happy to discuss the technical direction. Please respond at your earliest convenience..!!