William S. Massey (1920-2017) was an American mathematician known for his work in algebraic topology. The Blakers-Massey theorem and the Massey product were both named for him. His textbooks Singular Homology Theory and Algebraic Topology: An Introduction are also in the Graduate Texts in Mathematics series.

• 1: Two-Dimensional Manifolds .- 2: The Fundamental Group .- 3: Free Groups and Free Products of Groups.-  4: Seifert and Van Kampen Theorem on the Fundamental Group of the Union of Two Spaces. Applications .-  5: Covering Spaces .- 6: Background and Motivation for Homology Theory .- 7: Definitions and Basic Properties of Homology Theory .- 8: Determination of the Homology Groups of Certain Spaces: Applications and Further Properties of Homology Theory .- 9: Homology of CW-Complexes.-  10: Homology with Arbitrary Coefficient Groups .- 11: The Homology of Product Spaces.- 12: Cohomology Theory.- 13: Products in Homology and Cohomology.- 14: Duality Theorems for the Homology of Manifolds.- 15: Cup Products in Projective Spaces and Applications of Cup Products. Appendix A: A Proof of De Rham's Theorem..-  Appendix B: Permutation Groups or Tranformation Groups.

William S. Massey (1920-2017) was an American mathematician known for his work in algebraic topology. The Blakers-Massey theorem and the Massey product were both named for him. His textbooks Singular Homology Theory and Algebraic Topology: An Introduction are also in the Graduate Texts in Mathematics series.

• 1: Two-Dimensional Manifolds .- 2: The Fundamental Group .- 3: Free Groups and Free Products of Groups.-  4: Seifert and Van Kampen Theorem on the Fundamental Group of the Union of Two Spaces. Applications .-  5: Covering Spaces .- 6: Background and Motivation for Homology Theory .- 7: Definitions and Basic Properties of Homology Theory .- 8: Determination of the Homology Groups of Certain Spaces: Applications and Further Properties of Homology Theory .- 9: Homology of CW-Complexes.-  10: Homology with Arbitrary Coefficient Groups .- 11: The Homology of Product Spaces.- 12: Cohomology Theory.- 13: Products in Homology and Cohomology.- 14: Duality Theorems for the Homology of Manifolds.- 15: Cup Products in Projective Spaces and Applications of Cup Products. Appendix A: A Proof of De Rham's Theorem..-  Appendix B: Permutation Groups or Tranformation Groups.

William S. Massey (1920-2017) was an American mathematician known for his work in algebraic topology. The Blakers-Massey theorem and the Massey product were both named for him. His textbooks Singular Homology Theory and Algebraic Topology: An Introduction are also in the Graduate Texts in Mathematics series.

• 1: Two-Dimensional Manifolds .- 2: The Fundamental Group .- 3: Free Groups and Free Products of Groups.-  4: Seifert and Van Kampen Theorem on the Fundamental Group of the Union of Two Spaces. Applications .-  5: Covering Spaces .- 6: Background and Motivation for Homology Theory .- 7: Definitions and Basic Properties of Homology Theory .- 8: Determination of the Homology Groups of Certain Spaces: Applications and Further Properties of Homology Theory .- 9: Homology of CW-Complexes.-  10: Homology with Arbitrary Coefficient Groups .- 11: The Homology of Product Spaces.- 12: Cohomology Theory.- 13: Products in Homology and Cohomology.- 14: Duality Theorems for the Homology of Manifolds.- 15: Cup Products in Projective Spaces and Applications of Cup Products. Appendix A: A Proof of De Rham's Theorem..-  Appendix B: Permutation Groups or Tranformation Groups.