trureturingGitHub MATHEMATICAL ATLAS

ArithUnits / CONCEPT

A Non-Split Quotient of Finite Cyclic Groups

The additive quotient from ZMod 4 to ZMod 2 has no additive section.

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THEOREM

The mod-four quotient has no additive section

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A Non-Split Quotient of Finite Cyclic GroupsA Non-Split Quotient of FiniteCyclic Groups
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Lean sourceResearch workspace
Status
Closed
Depth
0
Layer
D5/S3
Domain
ArithUnits
Node ID
D5/S3/ArithUnits/NonSplitModFour
Repository path
D5/S3/ArithUnits/NonSplitModFour.lean
Truth release
sha256:c0d04258d27972c1cf58485e21d64dbcbe336405346ba95133913c64ba2856aa
Source commit
745bf90812f7175f83e1235688249f9495f23bfc
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143bc6c9ab9054c406f0cdd7f3b296eb38768b5c

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Dependency edges, status, and source coordinates come from the verified release and certified topology. Blueprint exposition is labeled separately. A fallback title carries no additional mathematical authority.