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Theorem equeucl 2106
Description: Equality is a left-Euclidean binary relation. (Right-Euclideanness is stated in ax-7 2090.) Curried (exported) form of equtr2 2109. (Contributed by BJ, 11-Apr-2021.)
Assertion
Ref Expression
equeucl (𝑥 = 𝑧 → (𝑦 = 𝑧𝑥 = 𝑦))

Proof of Theorem equeucl
StepHypRef Expression
1 equeuclr 2105 . 2 (𝑦 = 𝑧 → (𝑥 = 𝑧𝑥 = 𝑦))
21com12 32 1 (𝑥 = 𝑧 → (𝑦 = 𝑧𝑥 = 𝑦))
Colors of variables: wff setvar class
Syntax hints:  wi 4
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1871  ax-4 1886  ax-5 1988  ax-6 2054  ax-7 2090
This theorem depends on definitions:  df-bi 197  df-an 385  df-ex 1854
This theorem is referenced by:  equtr2  2109  ax13lem1  2393  ax13lem2  2441  bj-ax6elem2  32958  wl-ax13lem1  33600
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