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Theorem reeff1 12341
Description: The exponential function maps real arguments one-to-one to positive reals. (Contributed by Steve Rodriguez, 25-Aug-2007.) (Revised by Mario Carneiro, 10-Nov-2013.)
Assertion
Ref Expression
reeff1  |-  ( exp  |`  RR ) : RR -1-1-> RR+

Proof of Theorem reeff1
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eff 12304 . . . . 5  |-  exp : CC
--> CC
2 ffn 5489 . . . . 5  |-  ( exp
: CC --> CC  ->  exp 
Fn  CC )
31, 2ax-mp 5 . . . 4  |-  exp  Fn  CC
4 ax-resscn 8184 . . . 4  |-  RR  C_  CC
5 fnssres 5452 . . . 4  |-  ( ( exp  Fn  CC  /\  RR  C_  CC )  -> 
( exp  |`  RR )  Fn  RR )
63, 4, 5mp2an 426 . . 3  |-  ( exp  |`  RR )  Fn  RR
7 fvres 5672 . . . . 5  |-  ( x  e.  RR  ->  (
( exp  |`  RR ) `
 x )  =  ( exp `  x
) )
8 rpefcl 12326 . . . . 5  |-  ( x  e.  RR  ->  ( exp `  x )  e.  RR+ )
97, 8eqeltrd 2308 . . . 4  |-  ( x  e.  RR  ->  (
( exp  |`  RR ) `
 x )  e.  RR+ )
109rgen 2586 . . 3  |-  A. x  e.  RR  ( ( exp  |`  RR ) `  x
)  e.  RR+
11 ffnfv 5813 . . 3  |-  ( ( exp  |`  RR ) : RR --> RR+  <->  ( ( exp  |`  RR )  Fn  RR  /\ 
A. x  e.  RR  ( ( exp  |`  RR ) `
 x )  e.  RR+ ) )
126, 10, 11mpbir2an 951 . 2  |-  ( exp  |`  RR ) : RR --> RR+
13 fvres 5672 . . . . 5  |-  ( y  e.  RR  ->  (
( exp  |`  RR ) `
 y )  =  ( exp `  y
) )
147, 13eqeqan12d 2247 . . . 4  |-  ( ( x  e.  RR  /\  y  e.  RR )  ->  ( ( ( exp  |`  RR ) `  x
)  =  ( ( exp  |`  RR ) `  y )  <->  ( exp `  x )  =  ( exp `  y ) ) )
15 reef11 12340 . . . . 5  |-  ( ( x  e.  RR  /\  y  e.  RR )  ->  ( ( exp `  x
)  =  ( exp `  y )  <->  x  =  y ) )
1615biimpd 144 . . . 4  |-  ( ( x  e.  RR  /\  y  e.  RR )  ->  ( ( exp `  x
)  =  ( exp `  y )  ->  x  =  y ) )
1714, 16sylbid 150 . . 3  |-  ( ( x  e.  RR  /\  y  e.  RR )  ->  ( ( ( exp  |`  RR ) `  x
)  =  ( ( exp  |`  RR ) `  y )  ->  x  =  y ) )
1817rgen2a 2587 . 2  |-  A. x  e.  RR  A. y  e.  RR  ( ( ( exp  |`  RR ) `  x )  =  ( ( exp  |`  RR ) `
 y )  ->  x  =  y )
19 dff13 5919 . 2  |-  ( ( exp  |`  RR ) : RR -1-1-> RR+  <->  ( ( exp  |`  RR ) : RR --> RR+ 
/\  A. x  e.  RR  A. y  e.  RR  (
( ( exp  |`  RR ) `
 x )  =  ( ( exp  |`  RR ) `
 y )  ->  x  =  y )
) )
2012, 18, 19mpbir2an 951 1  |-  ( exp  |`  RR ) : RR -1-1-> RR+
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1398    e. wcel 2202   A.wral 2511    C_ wss 3201    |` cres 4733    Fn wfn 5328   -->wf 5329   -1-1->wf1 5330   ` cfv 5333   CCcc 8090   RRcr 8091   RR+crp 9949   expce 12283
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4209  ax-sep 4212  ax-nul 4220  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-iinf 4692  ax-cnex 8183  ax-resscn 8184  ax-1cn 8185  ax-1re 8186  ax-icn 8187  ax-addcl 8188  ax-addrcl 8189  ax-mulcl 8190  ax-mulrcl 8191  ax-addcom 8192  ax-mulcom 8193  ax-addass 8194  ax-mulass 8195  ax-distr 8196  ax-i2m1 8197  ax-0lt1 8198  ax-1rid 8199  ax-0id 8200  ax-rnegex 8201  ax-precex 8202  ax-cnre 8203  ax-pre-ltirr 8204  ax-pre-ltwlin 8205  ax-pre-lttrn 8206  ax-pre-apti 8207  ax-pre-ltadd 8208  ax-pre-mulgt0 8209  ax-pre-mulext 8210  ax-arch 8211  ax-caucvg 8212
This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-nel 2499  df-ral 2516  df-rex 2517  df-reu 2518  df-rmo 2519  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-nul 3497  df-if 3608  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-iun 3977  df-disj 4070  df-br 4094  df-opab 4156  df-mpt 4157  df-tr 4193  df-id 4396  df-po 4399  df-iso 4400  df-iord 4469  df-on 4471  df-ilim 4472  df-suc 4474  df-iom 4695  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-f1 5338  df-fo 5339  df-f1o 5340  df-fv 5341  df-isom 5342  df-riota 5981  df-ov 6031  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313  df-recs 6514  df-irdg 6579  df-frec 6600  df-1o 6625  df-oadd 6629  df-er 6745  df-en 6953  df-dom 6954  df-fin 6955  df-sup 7243  df-pnf 8275  df-mnf 8276  df-xr 8277  df-ltxr 8278  df-le 8279  df-sub 8411  df-neg 8412  df-reap 8814  df-ap 8821  df-div 8912  df-inn 9203  df-2 9261  df-3 9262  df-4 9263  df-n0 9462  df-z 9541  df-uz 9817  df-q 9915  df-rp 9950  df-ico 10190  df-fz 10306  df-fzo 10440  df-seqfrec 10773  df-exp 10864  df-fac 11051  df-bc 11073  df-ihash 11101  df-cj 11482  df-re 11483  df-im 11484  df-rsqrt 11638  df-abs 11639  df-clim 11919  df-sumdc 11994  df-ef 12289
This theorem is referenced by:  reeff1o  15584  relogef  15675
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