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| Mirrors > Home > MPE Home > Th. List > rpmulcld | Structured version Visualization version Unicode version | ||
| Description: Closure law for multiplication of positive reals. Part of Axiom 7 of [Apostol] p. 20. (Contributed by Mario Carneiro, 28-May-2016.) |
| Ref | Expression |
|---|---|
| rpred.1 |
|
| rpaddcld.1 |
|
| Ref | Expression |
|---|---|
| rpmulcld |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpred.1 |
. 2
| |
| 2 | rpaddcld.1 |
. 2
| |
| 3 | rpmulcl 11855 |
. 2
| |
| 4 | 1, 2, 3 | syl2anc 693 |
1
|
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