Description: A chained equality inference for inequality. (Contributed by NM, 6-Jun-2012) (Proof shortened by Wolf Lammen, 19-Nov-2019)
Ref | Expression | ||
---|---|---|---|
Hypotheses | eqnetrrid.1 | |
|
eqnetrrid.2 | |
||
Assertion | eqnetrrid | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqnetrrid.1 | |
|
2 | eqnetrrid.2 | |
|
3 | 1 | a1i | |
4 | 3 2 | eqnetrrd | |