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Central cohomology operations and K-theory
K-theory operations cobordism Algebraic Topology
2012/4/16
For stable degree zero operations, and also for additive unstable operations of bidegree (0,0), it is known that the centre of the ring of operations for complex cobordism is isomorphic to the corresp...
Higher homotopy operations and Andr?Quillen cohomology
Higher homotopy operations Andre-Quillen cohomology homotopycommutative diagram k-invariants obstruction theory
2011/9/15
Abstract: There are two main approaches to the problem of realizing a $\Pi$-algebra (a graded group $\Lambda$ equipped with an action of the primary homotopy operations) as the homotopy groups of a sp...