Description: Obsolete proof of tngbas as of 31-Oct-2024. The base set of a structure augmented with a norm. (Contributed by Mario Carneiro, 2-Oct-2015) (New usage is discouraged.) (Proof modification is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | tngbas.t | |- T = ( G toNrmGrp N ) |
|
| tngbas.2 | |- B = ( Base ` G ) |
||
| Assertion | tngbasOLD | |- ( N e. V -> B = ( Base ` T ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tngbas.t | |- T = ( G toNrmGrp N ) |
|
| 2 | tngbas.2 | |- B = ( Base ` G ) |
|
| 3 | df-base | |- Base = Slot 1 |
|
| 4 | 1nn | |- 1 e. NN |
|
| 5 | 1lt9 | |- 1 < 9 |
|
| 6 | 1 3 4 5 | tnglemOLD | |- ( N e. V -> ( Base ` G ) = ( Base ` T ) ) |
| 7 | 2 6 | eqtrid | |- ( N e. V -> B = ( Base ` T ) ) |