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SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
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Geometry
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Table of Contents - 20.37.7. Geometry
cplusr
cminusr
ctimesr
cptdfc
crr3c
cline3
df-addr
df-subr
df-mulv
addrval
subrval
mulvval
addrfv
subrfv
mulvfv
addrfn
subrfn
mulvfn
addrcom
df-ptdf
df-rr3
df-line3