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Mirrors > Home > MPE Home > Th. List > resubcl | Structured version Visualization version Unicode version |
Description: Closure law for subtraction of reals. (Contributed by NM, 20-Jan-1997.) |
Ref | Expression |
---|---|
resubcl |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recn 10026 | . . 3 | |
2 | recn 10026 | . . 3 | |
3 | negsub 10329 | . . 3 | |
4 | 1, 2, 3 | syl2an 494 | . 2 |
5 | renegcl 10344 | . . 3 | |
6 | readdcl 10019 | . . 3 | |
7 | 5, 6 | sylan2 491 | . 2 |
8 | 4, 7 | eqeltrrd 2702 | 1 |
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