Proposed places a conjecture in the year it was first stated. Wikipedia records the Poincare conjecture as proposed "in 1904," the starting point of nearly a century of failed and partial attempts before it was finally resolved. Browsing by proposed year traces how long an unresolved question has actually stood.
Facts
Comparison
Era Of Emergence Proposed
Sources
1. Mathematical Logic (Wikipedia)
Wikimedia FoundationHistory sectionQuote, History section
Mathematical logic emerged in the mid-19th century as a subfield of mathematics, reflecting the confluence of two traditions: formal philosophical logic and mathematics.
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