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| Mirrors > Home > ILE Home > Th. List > resubcld | Unicode version | ||
| Description: Closure law for subtraction of reals. (Contributed by Mario Carneiro, 27-May-2016.) | 
| Ref | Expression | 
|---|---|
| renegcld.1 | 
 | 
| resubcld.2 | 
 | 
| Ref | Expression | 
|---|---|
| resubcld | 
 | 
| Step | Hyp | Ref | Expression | 
|---|---|---|---|
| 1 | renegcld.1 | 
. 2
 | |
| 2 | resubcld.2 | 
. 2
 | |
| 3 | resubcl 8290 | 
. 2
 | |
| 4 | 1, 2, 3 | syl2anc 411 | 
1
 | 
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