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Adams operation
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<p>In <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, an Adams operation, denoted ψ<i>k</i> for natural numbers <i>k</i>, is a <a href="/facts/Cohomology_operation/s0eUNafv">cohomology operation</a> in <a href="/facts/Topological_K-theory/dNCXyK71">topological K-theory</a>, or any allied operation in <a href="/facts/Algebraic_K-theory/0RY5M49W">algebraic K-theory</a> or other types of algebraic construction, defined on a pattern introduced by <a href="/facts/Frank_Adams/fxgpN9Xk">Frank Adams</a>. The basic idea is to implement some fundamental identities in <a href="/facts/Symmetric_function/IB8N4T3m">symmetric function</a> theory, at the level of <a href="/facts/Vector_bundle/cXACAa1I">vector bundles</a> or other representing object in more abstract theories. </p><p>Adams operations can be defined more generally in any <a href="/facts/Lambda_ring/H1cuR45y">λ-ring</a>. </p>