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| Description: Ordinal exponentiation with zero mantissa and nonzero exponent. Proposition 8.31(2) of [TakeutiZaring] p. 67 and its converse. |
| Ref | Expression |
|---|---|
| oe0m1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eloni 2964 |
. . 3
| |
| 2 | ordgt0ge1 4150 |
. . 3
| |
| 3 | 1, 2 | syl 10 |
. 2
|
| 4 | oe0m 4163 |
. . . 4
| |
| 5 | 4 | eqeq1d 1486 |
. . 3
|
| 6 | ssdif0 2331 |
. . 3
| |
| 7 | 5, 6 | syl6rbbr 541 |
. 2
|
| 8 | 3, 7 | bitrd 530 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: oev2 4168 oesuc 4172 oecl 4178 oewordri 4225 oelim2 4228 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-9 967 ax-10 968 ax-11 969 ax-12 970 ax-13 971 ax-14 972 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 ax-sep 2708 ax-nul 2715 ax-pow 2748 ax-pr 2785 ax-un 2872 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 778 df-3an 779 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-ral 1652 df-rex 1653 df-v 1815 df-sbc 1945 df-csb 2005 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-if 2366 df-pw 2406 df-sn 2416 df-pr 2417 df-tp 2419 df-op 2420 df-uni 2508 df-br 2625 df-opab 2672 df-tr 2686 df-eprel 2838 df-id 2841 df-po 2846 df-so 2856 df-fr 2923 df-we 2940 df-ord 2957 df-on 2958 df-suc 2960 df-xp 3190 df-rel 3191 df-cnv 3192 df-co 3193 df-dm 3194 df-rn 3195 df-res 3196 df-ima 3197 df-fun 3198 df-fv 3204 df-rdg 3938 df-opr 3971 df-oprab 3972 df-1o 4139 df-oexp 4143 |