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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recn 9654 |
. . 3
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2 | recn 9654 |
. . 3
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3 | negsub 9947 |
. . 3
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4 | 1, 2, 3 | syl2an 484 |
. 2
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5 | renegcl 9962 |
. . 3
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6 | readdcl 9647 |
. . 3
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7 | 5, 6 | sylan2 481 |
. 2
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8 | 4, 7 | eqeltrrd 2540 |
1
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