Theorem m1p1sr 9913

Description: Minus one plus one is zero for signed reals. (Contributed by NM, 5-May-1996.) (New usage is discouraged.)

Assertion

Ref	Expression
m1p1sr	|- ( -1R +R 1R ) = 0R

Proof of Theorem m1p1sr

Step	Hyp	Ref	Expression
1		df-m1r 9884	. . 3 |- -1R = [ <. 1P , ( 1P +P. 1P ) >. ] ~R
2		df-1r 9883	. . 3 |- 1R = [ <. ( 1P +P. 1P ) , 1P >. ] ~R
3	1, 2	oveq12i 6662	. 2 |- ( -1R +R 1R ) = ( [ <. 1P , ( 1P +P. 1P ) >. ] ~R +R [ <. ( 1P +P. 1P ) , 1P >. ] ~R )
4		df-0r 9882	. . 3 |- 0R = [ <. 1P , 1P >. ] ~R
5		1pr 9837	. . . . 5 |- 1P e. P.
6		addclpr 9840	. . . . . 6 |- ( ( 1P e. P. /\ 1P e. P. ) -> ( 1P +P. 1P ) e. P. )
7	5, 5, 6	mp2an 708	. . . . 5 |- ( 1P +P. 1P ) e. P.
8		addsrpr 9896	. . . . 5 |- ( ( ( 1P e. P. /\ ( 1P +P. 1P ) e. P. ) /\ ( ( 1P +P. 1P ) e. P. /\ 1P e. P. ) ) -> ( [ <. 1P , ( 1P +P. 1P ) >. ] ~R +R [ <. ( 1P +P. 1P ) , 1P >. ] ~R ) = [ <. ( 1P +P. ( 1P +P. 1P ) ) , ( ( 1P +P. 1P ) +P. 1P ) >. ] ~R )
9	5, 7, 7, 5, 8	mp4an 709	. . . 4 |- ( [ <. 1P , ( 1P +P. 1P ) >. ] ~R +R [ <. ( 1P +P. 1P ) , 1P >. ] ~R ) = [ <. ( 1P +P. ( 1P +P. 1P ) ) , ( ( 1P +P. 1P ) +P. 1P ) >. ] ~R
10		addasspr 9844	. . . . . 6 |- ( ( 1P +P. 1P ) +P. 1P ) = ( 1P +P. ( 1P +P. 1P ) )
11	10	oveq2i 6661	. . . . 5 |- ( 1P +P. ( ( 1P +P. 1P ) +P. 1P ) ) = ( 1P +P. ( 1P +P. ( 1P +P. 1P ) ) )
12		addclpr 9840	. . . . . . 7 |- ( ( 1P e. P. /\ ( 1P +P. 1P ) e. P. ) -> ( 1P +P. ( 1P +P. 1P ) ) e. P. )
13	5, 7, 12	mp2an 708	. . . . . 6 |- ( 1P +P. ( 1P +P. 1P ) ) e. P.
14		addclpr 9840	. . . . . . 7 |- ( ( ( 1P +P. 1P ) e. P. /\ 1P e. P. ) -> ( ( 1P +P. 1P ) +P. 1P ) e. P. )
15	7, 5, 14	mp2an 708	. . . . . 6 |- ( ( 1P +P. 1P ) +P. 1P ) e. P.
16		enreceq 9887	. . . . . 6 |- ( ( ( 1P e. P. /\ 1P e. P. ) /\ ( ( 1P +P. ( 1P +P. 1P ) ) e. P. /\ ( ( 1P +P. 1P ) +P. 1P ) e. P. ) ) -> ( [ <. 1P , 1P >. ] ~R = [ <. ( 1P +P. ( 1P +P. 1P ) ) , ( ( 1P +P. 1P ) +P. 1P ) >. ] ~R <-> ( 1P +P. ( ( 1P +P. 1P ) +P. 1P ) ) = ( 1P +P. ( 1P +P. ( 1P +P. 1P ) ) ) ) )
17	5, 5, 13, 15, 16	mp4an 709	. . . . 5 |- ( [ <. 1P , 1P >. ] ~R = [ <. ( 1P +P. ( 1P +P. 1P ) ) , ( ( 1P +P. 1P ) +P. 1P ) >. ] ~R <-> ( 1P +P. ( ( 1P +P. 1P ) +P. 1P ) ) = ( 1P +P. ( 1P +P. ( 1P +P. 1P ) ) ) )
18	11, 17	mpbir 221	. . . 4 |- [ <. 1P , 1P >. ] ~R = [ <. ( 1P +P. ( 1P +P. 1P ) ) , ( ( 1P +P. 1P ) +P. 1P ) >. ] ~R
19	9, 18	eqtr4i 2647	. . 3 |- ( [ <. 1P , ( 1P +P. 1P ) >. ] ~R +R [ <. ( 1P +P. 1P ) , 1P >. ] ~R ) = [ <. 1P , 1P >. ] ~R
20	4, 19	eqtr4i 2647	. 2 |- 0R = ( [ <. 1P , ( 1P +P. 1P ) >. ] ~R +R [ <. ( 1P +P. 1P ) , 1P >. ] ~R )
21	3, 20	eqtr4i 2647	1 |- ( -1R +R 1R ) = 0R

Syntax hints:   <-> wb 196   = wceq 1483   e. wcel 1990   <.cop 4183  (class class class)co 6650   [cec 7740   P.cnp 9681   1Pc1p 9682   +P. cpp 9683   ~R cer 9686   0Rc0r 9688   1Rc1r 9689   -1Rcm1r 9690   +R cplr 9691

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-inf2 8538

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-omul 7565  df-er 7742  df-ec 7744  df-qs 7748  df-ni 9694  df-pli 9695  df-mi 9696  df-lti 9697  df-plpq 9730  df-mpq 9731  df-ltpq 9732  df-enq 9733  df-nq 9734  df-erq 9735  df-plq 9736  df-mq 9737  df-1nq 9738  df-rq 9739  df-ltnq 9740  df-np 9803  df-1p 9804  df-plp 9805  df-ltp 9807  df-enr 9877  df-nr 9878  df-plr 9879  df-0r 9882  df-1r 9883  df-m1r 9884

This theorem is referenced by:  pn0sr  9922  supsrlem  9932  axi2m1  9980