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SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Alexander van der Vekens
Elementary geometry (extension)
Auxiliary theorems
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fv1prop
Metamath Proof Explorer
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Structured
Table of Contents - 21.50.22.1. Auxiliary theorems
fv1prop
fv2prop
submuladdmuld
affinecomb1
affinecomb2
affineid
1subrec1sub
resum2sqcl
resum2sqgt0
resum2sqrp
resum2sqorgt0
reorelicc