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Mirrors > Home > MPE Home > Th. List > zsubcl | Structured version Visualization version Unicode version |
Description: Closure of subtraction of integers. (Contributed by NM, 11-May-2004.) |
Ref | Expression |
---|---|
zsubcl |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | zcn 11382 |
. . 3
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2 | zcn 11382 |
. . 3
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3 | negsub 10329 |
. . 3
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4 | 1, 2, 3 | syl2an 494 |
. 2
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5 | znegcl 11412 |
. . 3
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6 | zaddcl 11417 |
. . 3
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7 | 5, 6 | sylan2 491 |
. 2
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8 | 4, 7 | eqeltrrd 2702 |
1
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