The complements in the two marked link concordance groups are isomorphic to Z^∞ ⊕ (Z/2Z)^∞ and every element has a unique prime decomposition yielding a canonical normal form.
Yasuhara,Connecting lemmas and representing homology classes of simply connected 4-manifolds, Tokyo J
3 Pith papers cite this work. Polarity classification is still indexing.
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Characterizes when differential polynomial rings R[t;δ] admit compatible Γ-gradings and proves graded analogues of simplicity, primeness, and Noetherianity theorems.
Under a division condition, tangential CR cohomology on compact Lie groups with left-invariant CR structures is finite-dimensional and computable on maximal tori, with necessity shown for a class of structures.
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Graded differential polynomial rings
Characterizes when differential polynomial rings R[t;δ] admit compatible Γ-gradings and proves graded analogues of simplicity, primeness, and Noetherianity theorems.