Database
SUPPLEMENTARY MATERIAL (USERS' MATHBOXES)
Mathbox for Peter Mazsa
Partition-Equivalence Theorems
eldisjim2
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eqvrel0
Metamath Proof Explorer
Ascii
Unicode
Theorem
eldisjim2
Description:
Alternate form of
eldisjim
.
(Contributed by
Peter Mazsa
, 30-Dec-2024)
Ref
Expression
Assertion
eldisjim2
⊢
ElDisj
A
→
EqvRel
∼
A
Proof
Step
Hyp
Ref
Expression
1
disjim
⊢
Disj
E
-1
↾
A
→
EqvRel
≀
E
-1
↾
A
2
df-eldisj
⊢
ElDisj
A
↔
Disj
E
-1
↾
A
3
df-coels
⊢
∼
A
=
≀
E
-1
↾
A
4
3
eqvreleqi
⊢
EqvRel
∼
A
↔
EqvRel
≀
E
-1
↾
A
5
1
2
4
3imtr4i
⊢
ElDisj
A
→
EqvRel
∼
A