Quantum cohomology is a branch of mathematics that combines concepts from algebraic geometry, symplectic geometry, and quantum physics. It arises in the study of certain moduli spaces and has applications in various fields, including string theory, mathematical physics, and enumerative geometry. At a high level, quantum cohomology seeks to extend classical cohomology theories, particularly for projective varieties, to incorporate quantum effects, which can be thought of as counting curves under certain conditions.
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