Complex sentence: In mathematics, the "E" ₈ manifold is the unique compact, simply connected topological 4-manifold with intersection form the "E" ₈ lattice, discovered by Michael Freedman in 1982.
Split into simpler sentences: In mathematics, the "E" ₈ manifold is the unique compact, simply connected topological 4-manifold with intersection form the "E" ₈ lattice. The "E" ₈ manifold was discovered by Michael Freedman in 1982.