| Step | Hyp | Ref | Expression | 
						
							| 1 |  | curfval.g |  | 
						
							| 2 |  | curfval.a |  | 
						
							| 3 |  | curfval.c |  | 
						
							| 4 |  | curfval.d |  | 
						
							| 5 |  | curfval.f |  | 
						
							| 6 |  | curfval.b |  | 
						
							| 7 |  | curf1.x |  | 
						
							| 8 |  | curf1.k |  | 
						
							| 9 |  | eqid |  | 
						
							| 10 |  | eqid |  | 
						
							| 11 | 1 2 3 4 5 6 7 8 9 10 | curf1 |  | 
						
							| 12 | 6 | fvexi |  | 
						
							| 13 | 12 | mptex |  | 
						
							| 14 | 12 12 | mpoex |  | 
						
							| 15 | 13 14 | op1std |  | 
						
							| 16 | 11 15 | syl |  | 
						
							| 17 | 13 14 | op2ndd |  | 
						
							| 18 | 11 17 | syl |  | 
						
							| 19 | 16 18 | opeq12d |  | 
						
							| 20 | 11 19 | eqtr4d |  | 
						
							| 21 |  | eqid |  | 
						
							| 22 |  | eqid |  | 
						
							| 23 |  | eqid |  | 
						
							| 24 |  | eqid |  | 
						
							| 25 |  | eqid |  | 
						
							| 26 |  | eqid |  | 
						
							| 27 |  | funcrcl |  | 
						
							| 28 | 5 27 | syl |  | 
						
							| 29 | 28 | simprd |  | 
						
							| 30 |  | eqid |  | 
						
							| 31 | 30 2 6 | xpcbas |  | 
						
							| 32 |  | relfunc |  | 
						
							| 33 |  | 1st2ndbr |  | 
						
							| 34 | 32 5 33 | sylancr |  | 
						
							| 35 | 31 21 34 | funcf1 |  | 
						
							| 36 | 35 | adantr |  | 
						
							| 37 | 7 | adantr |  | 
						
							| 38 |  | simpr |  | 
						
							| 39 | 36 37 38 | fovcdmd |  | 
						
							| 40 | 16 39 | fmpt3d |  | 
						
							| 41 |  | eqid |  | 
						
							| 42 |  | ovex |  | 
						
							| 43 | 42 | mptex |  | 
						
							| 44 | 41 43 | fnmpoi |  | 
						
							| 45 | 18 | fneq1d |  | 
						
							| 46 | 44 45 | mpbiri |  | 
						
							| 47 | 18 | oveqd |  | 
						
							| 48 | 41 | ovmpt4g |  | 
						
							| 49 | 43 48 | mp3an3 |  | 
						
							| 50 | 47 49 | sylan9eq |  | 
						
							| 51 |  | eqid |  | 
						
							| 52 | 34 | ad2antrr |  | 
						
							| 53 | 7 | ad2antrr |  | 
						
							| 54 |  | simplrl |  | 
						
							| 55 | 53 54 | opelxpd |  | 
						
							| 56 |  | simplrr |  | 
						
							| 57 | 53 56 | opelxpd |  | 
						
							| 58 | 31 51 22 52 55 57 | funcf2 |  | 
						
							| 59 |  | eqid |  | 
						
							| 60 | 30 31 59 9 51 55 57 | xpchom |  | 
						
							| 61 | 3 | ad2antrr |  | 
						
							| 62 | 4 | ad2antrr |  | 
						
							| 63 | 5 | ad2antrr |  | 
						
							| 64 | 1 2 61 62 63 6 53 8 54 | curf11 |  | 
						
							| 65 |  | df-ov |  | 
						
							| 66 | 64 65 | eqtr2di |  | 
						
							| 67 | 1 2 61 62 63 6 53 8 56 | curf11 |  | 
						
							| 68 |  | df-ov |  | 
						
							| 69 | 67 68 | eqtr2di |  | 
						
							| 70 | 66 69 | oveq12d |  | 
						
							| 71 | 60 70 | feq23d |  | 
						
							| 72 | 58 71 | mpbid |  | 
						
							| 73 | 2 59 10 61 53 | catidcl |  | 
						
							| 74 |  | op1stg |  | 
						
							| 75 | 53 54 74 | syl2anc |  | 
						
							| 76 |  | op1stg |  | 
						
							| 77 | 53 56 76 | syl2anc |  | 
						
							| 78 | 75 77 | oveq12d |  | 
						
							| 79 | 73 78 | eleqtrrd |  | 
						
							| 80 |  | simpr |  | 
						
							| 81 |  | op2ndg |  | 
						
							| 82 | 53 54 81 | syl2anc |  | 
						
							| 83 |  | op2ndg |  | 
						
							| 84 | 53 56 83 | syl2anc |  | 
						
							| 85 | 82 84 | oveq12d |  | 
						
							| 86 | 80 85 | eleqtrrd |  | 
						
							| 87 | 72 79 86 | fovcdmd |  | 
						
							| 88 | 50 87 | fmpt3d |  | 
						
							| 89 | 3 | adantr |  | 
						
							| 90 | 4 | adantr |  | 
						
							| 91 |  | eqid |  | 
						
							| 92 | 30 89 90 2 6 10 23 91 37 38 | xpcid |  | 
						
							| 93 | 92 | fveq2d |  | 
						
							| 94 |  | df-ov |  | 
						
							| 95 | 93 94 | eqtr4di |  | 
						
							| 96 | 34 | adantr |  | 
						
							| 97 |  | opelxpi |  | 
						
							| 98 | 7 97 | sylan |  | 
						
							| 99 | 31 91 24 96 98 | funcid |  | 
						
							| 100 | 95 99 | eqtr3d |  | 
						
							| 101 | 5 | adantr |  | 
						
							| 102 | 6 9 23 90 38 | catidcl |  | 
						
							| 103 | 1 2 89 90 101 6 37 8 38 9 10 38 102 | curf12 |  | 
						
							| 104 | 1 2 89 90 101 6 37 8 38 | curf11 |  | 
						
							| 105 | 104 65 | eqtrdi |  | 
						
							| 106 | 105 | fveq2d |  | 
						
							| 107 | 100 103 106 | 3eqtr4d |  | 
						
							| 108 | 7 | 3ad2ant1 |  | 
						
							| 109 |  | simp21 |  | 
						
							| 110 |  | simp22 |  | 
						
							| 111 |  | eqid |  | 
						
							| 112 |  | eqid |  | 
						
							| 113 |  | simp23 |  | 
						
							| 114 | 3 | 3ad2ant1 |  | 
						
							| 115 | 2 59 10 114 108 | catidcl |  | 
						
							| 116 |  | simp3l |  | 
						
							| 117 |  | simp3r |  | 
						
							| 118 | 30 2 6 59 9 108 109 108 110 111 25 112 108 113 115 116 115 117 | xpcco2 |  | 
						
							| 119 | 2 59 10 114 108 111 108 115 | catlid |  | 
						
							| 120 | 119 | opeq1d |  | 
						
							| 121 | 118 120 | eqtrd |  | 
						
							| 122 | 121 | fveq2d |  | 
						
							| 123 |  | df-ov |  | 
						
							| 124 | 122 123 | eqtr4di |  | 
						
							| 125 | 34 | 3ad2ant1 |  | 
						
							| 126 | 108 109 | opelxpd |  | 
						
							| 127 | 108 110 | opelxpd |  | 
						
							| 128 | 108 113 | opelxpd |  | 
						
							| 129 | 115 116 | opelxpd |  | 
						
							| 130 | 30 2 6 59 9 108 109 108 110 51 | xpchom2 |  | 
						
							| 131 | 129 130 | eleqtrrd |  | 
						
							| 132 | 115 117 | opelxpd |  | 
						
							| 133 | 30 2 6 59 9 108 110 108 113 51 | xpchom2 |  | 
						
							| 134 | 132 133 | eleqtrrd |  | 
						
							| 135 | 31 51 112 26 125 126 127 128 131 134 | funcco |  | 
						
							| 136 | 124 135 | eqtr3d |  | 
						
							| 137 | 4 | 3ad2ant1 |  | 
						
							| 138 | 5 | 3ad2ant1 |  | 
						
							| 139 | 6 9 25 137 109 110 113 116 117 | catcocl |  | 
						
							| 140 | 1 2 114 137 138 6 108 8 109 9 10 113 139 | curf12 |  | 
						
							| 141 | 1 2 114 137 138 6 108 8 109 | curf11 |  | 
						
							| 142 | 141 65 | eqtrdi |  | 
						
							| 143 | 1 2 114 137 138 6 108 8 110 | curf11 |  | 
						
							| 144 | 143 68 | eqtrdi |  | 
						
							| 145 | 142 144 | opeq12d |  | 
						
							| 146 | 1 2 114 137 138 6 108 8 113 | curf11 |  | 
						
							| 147 |  | df-ov |  | 
						
							| 148 | 146 147 | eqtrdi |  | 
						
							| 149 | 145 148 | oveq12d |  | 
						
							| 150 | 1 2 114 137 138 6 108 8 110 9 10 113 117 | curf12 |  | 
						
							| 151 |  | df-ov |  | 
						
							| 152 | 150 151 | eqtrdi |  | 
						
							| 153 | 1 2 114 137 138 6 108 8 109 9 10 110 116 | curf12 |  | 
						
							| 154 |  | df-ov |  | 
						
							| 155 | 153 154 | eqtrdi |  | 
						
							| 156 | 149 152 155 | oveq123d |  | 
						
							| 157 | 136 140 156 | 3eqtr4d |  | 
						
							| 158 | 6 21 9 22 23 24 25 26 4 29 40 46 88 107 157 | isfuncd |  | 
						
							| 159 |  | df-br |  | 
						
							| 160 | 158 159 | sylib |  | 
						
							| 161 | 20 160 | eqeltrd |  |