| Metamath Proof Explorer |
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Related theorems Unicode version |
| Description: The standard reals are a subset of the extended reals. |
| Ref | Expression |
|---|---|
| ressxr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssun1 2193 |
. 2
| |
| 2 | df-xr 5489 |
. 2
| |
| 3 | 1, 2 | sseqtr4 2094 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: rexrt 5499 supxrre 6083 supxrbnd 6091 supxrgtmnf 6092 supxrre1 6093 supxrre2 6094 nmoxr 8429 nmoge0 8430 nmolb 8434 nmoubi 8435 nmlno0lem 8453 nmopxrt 9793 nmfnxrt 9806 nmoplbt 9831 nmopubt 9832 nmfnlbt 9848 nmfnleubt 9849 nmlnop0ALT 9920 nmopunt 9939 nmcopexlem1 9951 nmcfnexlem1 9980 branmfnt 10038 pjnmop 10075 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 962 ax-gen 963 ax-8 964 ax-10 966 ax-12 968 ax-17 971 ax-4 973 ax-5o 975 ax-6o 978 ax-9o 1123 ax-10o 1140 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 981 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-v 1812 df-un 2050 df-in 2051 df-ss 2053 df-xr 5489 |