| Step | Hyp | Ref | Expression | 
						
							| 1 |  | lgamgulm.r |  | 
						
							| 2 |  | lgamgulm.u |  | 
						
							| 3 |  | lgamgulm.n |  | 
						
							| 4 |  | lgamgulm.a |  | 
						
							| 5 |  | lgamgulm.l |  | 
						
							| 6 |  | 1elunit |  | 
						
							| 7 |  | 0elunit |  | 
						
							| 8 |  | 0red |  | 
						
							| 9 |  | 1red |  | 
						
							| 10 |  | eqid |  | 
						
							| 11 | 10 | subcn |  | 
						
							| 12 | 11 | a1i |  | 
						
							| 13 | 1 2 | lgamgulmlem1 |  | 
						
							| 14 | 13 4 | sseldd |  | 
						
							| 15 | 14 | eldifad |  | 
						
							| 16 | 3 | nnred |  | 
						
							| 17 | 16 | recnd |  | 
						
							| 18 | 3 | nnne0d |  | 
						
							| 19 | 15 17 18 | divcld |  | 
						
							| 20 |  | unitssre |  | 
						
							| 21 |  | ax-resscn |  | 
						
							| 22 | 20 21 | sstri |  | 
						
							| 23 | 22 | a1i |  | 
						
							| 24 |  | ssidd |  | 
						
							| 25 |  | cncfmptc |  | 
						
							| 26 | 19 23 24 25 | syl3anc |  | 
						
							| 27 |  | cncfmptid |  | 
						
							| 28 | 22 24 27 | sylancr |  | 
						
							| 29 | 26 28 | mulcncf |  | 
						
							| 30 |  | eqid |  | 
						
							| 31 | 30 | logcn |  | 
						
							| 32 | 31 | a1i |  | 
						
							| 33 |  | cncff |  | 
						
							| 34 | 32 33 | syl |  | 
						
							| 35 | 19 | adantr |  | 
						
							| 36 |  | simpr |  | 
						
							| 37 | 20 36 | sselid |  | 
						
							| 38 | 37 | recnd |  | 
						
							| 39 | 35 38 | mulcld |  | 
						
							| 40 |  | 1cnd |  | 
						
							| 41 | 39 40 | addcld |  | 
						
							| 42 |  | rere |  | 
						
							| 43 | 42 | adantl |  | 
						
							| 44 | 41 | recld |  | 
						
							| 45 | 39 | recld |  | 
						
							| 46 | 45 | recnd |  | 
						
							| 47 | 46 | abscld |  | 
						
							| 48 | 39 | abscld |  | 
						
							| 49 |  | 1red |  | 
						
							| 50 |  | absrele |  | 
						
							| 51 | 39 50 | syl |  | 
						
							| 52 | 49 | rehalfcld |  | 
						
							| 53 | 1 | nnred |  | 
						
							| 54 | 53 | adantr |  | 
						
							| 55 | 3 | adantr |  | 
						
							| 56 | 54 55 | nndivred |  | 
						
							| 57 | 19 | abscld |  | 
						
							| 58 | 57 | adantr |  | 
						
							| 59 | 35 | absge0d |  | 
						
							| 60 |  | elicc01 |  | 
						
							| 61 | 60 | simp2bi |  | 
						
							| 62 | 61 | adantl |  | 
						
							| 63 | 15 17 18 | absdivd |  | 
						
							| 64 | 3 | nnrpd |  | 
						
							| 65 | 64 | rpge0d |  | 
						
							| 66 | 16 65 | absidd |  | 
						
							| 67 | 66 | oveq2d |  | 
						
							| 68 | 63 67 | eqtr2d |  | 
						
							| 69 | 15 | abscld |  | 
						
							| 70 |  | fveq2 |  | 
						
							| 71 | 70 | breq1d |  | 
						
							| 72 |  | fvoveq1 |  | 
						
							| 73 | 72 | breq2d |  | 
						
							| 74 | 73 | ralbidv |  | 
						
							| 75 | 71 74 | anbi12d |  | 
						
							| 76 | 75 2 | elrab2 |  | 
						
							| 77 | 76 | simprbi |  | 
						
							| 78 | 4 77 | syl |  | 
						
							| 79 | 78 | simpld |  | 
						
							| 80 | 69 53 64 79 | lediv1dd |  | 
						
							| 81 | 68 80 | eqbrtrrd |  | 
						
							| 82 | 81 | adantr |  | 
						
							| 83 | 60 | simp3bi |  | 
						
							| 84 | 83 | adantl |  | 
						
							| 85 | 58 56 37 49 59 62 82 84 | lemul12ad |  | 
						
							| 86 | 35 38 | absmuld |  | 
						
							| 87 | 37 62 | absidd |  | 
						
							| 88 | 87 | oveq2d |  | 
						
							| 89 | 86 88 | eqtr2d |  | 
						
							| 90 | 56 | recnd |  | 
						
							| 91 | 90 | mulridd |  | 
						
							| 92 | 85 89 91 | 3brtr3d |  | 
						
							| 93 |  | 2rp |  | 
						
							| 94 | 93 | a1i |  | 
						
							| 95 | 53 16 94 | lemuldiv2d |  | 
						
							| 96 | 5 95 | mpbid |  | 
						
							| 97 |  | 2cnd |  | 
						
							| 98 |  | 2ne0 |  | 
						
							| 99 | 98 | a1i |  | 
						
							| 100 | 17 97 99 | divrecd |  | 
						
							| 101 | 96 100 | breqtrd |  | 
						
							| 102 | 9 | rehalfcld |  | 
						
							| 103 | 53 102 64 | ledivmuld |  | 
						
							| 104 | 101 103 | mpbird |  | 
						
							| 105 | 104 | adantr |  | 
						
							| 106 | 48 56 52 92 105 | letrd |  | 
						
							| 107 |  | halflt1 |  | 
						
							| 108 | 107 | a1i |  | 
						
							| 109 | 48 52 49 106 108 | lelttrd |  | 
						
							| 110 | 47 48 49 51 109 | lelttrd |  | 
						
							| 111 | 45 49 | absltd |  | 
						
							| 112 | 110 111 | mpbid |  | 
						
							| 113 | 112 | simpld |  | 
						
							| 114 | 49 | renegcld |  | 
						
							| 115 | 114 45 | posdifd |  | 
						
							| 116 | 113 115 | mpbid |  | 
						
							| 117 | 46 40 | subnegd |  | 
						
							| 118 | 116 117 | breqtrd |  | 
						
							| 119 | 39 40 | readdd |  | 
						
							| 120 |  | re1 |  | 
						
							| 121 | 120 | oveq2i |  | 
						
							| 122 | 119 121 | eqtrdi |  | 
						
							| 123 | 118 122 | breqtrrd |  | 
						
							| 124 | 44 123 | elrpd |  | 
						
							| 125 | 124 | adantr |  | 
						
							| 126 | 43 125 | eqeltrrd |  | 
						
							| 127 | 126 | ex |  | 
						
							| 128 | 30 | ellogdm |  | 
						
							| 129 | 41 127 128 | sylanbrc |  | 
						
							| 130 | 34 129 | cofmpt |  | 
						
							| 131 | 129 | fvresd |  | 
						
							| 132 | 131 | mpteq2dva |  | 
						
							| 133 | 130 132 | eqtrd |  | 
						
							| 134 | 129 | fmpttd |  | 
						
							| 135 |  | difss |  | 
						
							| 136 | 10 | addcn |  | 
						
							| 137 | 136 | a1i |  | 
						
							| 138 |  | 1cnd |  | 
						
							| 139 |  | cncfmptc |  | 
						
							| 140 | 138 23 24 139 | syl3anc |  | 
						
							| 141 | 10 137 29 140 | cncfmpt2f |  | 
						
							| 142 |  | cncfcdm |  | 
						
							| 143 | 135 141 142 | sylancr |  | 
						
							| 144 | 134 143 | mpbird |  | 
						
							| 145 | 144 32 | cncfco |  | 
						
							| 146 | 133 145 | eqeltrrd |  | 
						
							| 147 | 10 12 29 146 | cncfmpt2f |  | 
						
							| 148 | 21 | a1i |  | 
						
							| 149 | 20 | a1i |  | 
						
							| 150 | 30 | logdmn0 |  | 
						
							| 151 | 129 150 | syl |  | 
						
							| 152 | 41 151 | logcld |  | 
						
							| 153 | 39 152 | subcld |  | 
						
							| 154 |  | tgioo4 |  | 
						
							| 155 |  | 0re |  | 
						
							| 156 |  | iccntr |  | 
						
							| 157 | 155 9 156 | sylancr |  | 
						
							| 158 | 148 149 153 154 10 157 | dvmptntr |  | 
						
							| 159 |  | reelprrecn |  | 
						
							| 160 | 159 | a1i |  | 
						
							| 161 | 15 | adantr |  | 
						
							| 162 | 17 | adantr |  | 
						
							| 163 | 18 | adantr |  | 
						
							| 164 | 161 162 163 | divcld |  | 
						
							| 165 |  | ioossicc |  | 
						
							| 166 | 165 | sseli |  | 
						
							| 167 | 166 38 | sylan2 |  | 
						
							| 168 | 164 167 | mulcld |  | 
						
							| 169 | 15 | adantr |  | 
						
							| 170 | 17 | adantr |  | 
						
							| 171 | 18 | adantr |  | 
						
							| 172 | 169 170 171 | divcld |  | 
						
							| 173 | 148 | sselda |  | 
						
							| 174 | 172 173 | mulcld |  | 
						
							| 175 |  | 1cnd |  | 
						
							| 176 | 160 | dvmptid |  | 
						
							| 177 | 160 173 175 176 19 | dvmptcmul |  | 
						
							| 178 | 19 | mulridd |  | 
						
							| 179 | 178 | mpteq2dv |  | 
						
							| 180 | 177 179 | eqtrd |  | 
						
							| 181 | 165 149 | sstrid |  | 
						
							| 182 |  | retop |  | 
						
							| 183 |  | iooretop |  | 
						
							| 184 |  | isopn3i |  | 
						
							| 185 | 182 183 184 | mp2an |  | 
						
							| 186 | 185 | a1i |  | 
						
							| 187 | 160 174 172 180 181 154 10 186 | dvmptres2 |  | 
						
							| 188 | 166 152 | sylan2 |  | 
						
							| 189 |  | 1cnd |  | 
						
							| 190 | 168 189 | addcld |  | 
						
							| 191 | 166 151 | sylan2 |  | 
						
							| 192 | 190 191 | reccld |  | 
						
							| 193 | 192 164 | mulcld |  | 
						
							| 194 |  | cnelprrecn |  | 
						
							| 195 | 194 | a1i |  | 
						
							| 196 | 166 129 | sylan2 |  | 
						
							| 197 |  | eldifi |  | 
						
							| 198 | 197 | adantl |  | 
						
							| 199 | 30 | logdmn0 |  | 
						
							| 200 | 199 | adantl |  | 
						
							| 201 | 198 200 | logcld |  | 
						
							| 202 | 198 200 | reccld |  | 
						
							| 203 | 174 175 | addcld |  | 
						
							| 204 |  | 0cnd |  | 
						
							| 205 | 160 138 | dvmptc |  | 
						
							| 206 | 160 174 172 180 175 204 205 | dvmptadd |  | 
						
							| 207 | 19 | addridd |  | 
						
							| 208 | 207 | mpteq2dv |  | 
						
							| 209 | 206 208 | eqtrd |  | 
						
							| 210 | 160 203 172 209 181 154 10 186 | dvmptres2 |  | 
						
							| 211 | 34 | feqmptd |  | 
						
							| 212 |  | fvres |  | 
						
							| 213 | 212 | mpteq2ia |  | 
						
							| 214 | 211 213 | eqtr2di |  | 
						
							| 215 | 214 | oveq2d |  | 
						
							| 216 | 30 | dvlog |  | 
						
							| 217 | 215 216 | eqtrdi |  | 
						
							| 218 |  | fveq2 |  | 
						
							| 219 |  | oveq2 |  | 
						
							| 220 | 160 195 196 164 201 202 210 217 218 219 | dvmptco |  | 
						
							| 221 | 160 168 164 187 188 193 220 | dvmptsub |  | 
						
							| 222 | 158 221 | eqtrd |  | 
						
							| 223 | 222 | dmeqd |  | 
						
							| 224 |  | ovex |  | 
						
							| 225 |  | eqid |  | 
						
							| 226 | 224 225 | dmmpti |  | 
						
							| 227 | 223 226 | eqtrdi |  | 
						
							| 228 |  | 2re |  | 
						
							| 229 | 228 | a1i |  | 
						
							| 230 | 229 53 | remulcld |  | 
						
							| 231 | 1 | nnrpd |  | 
						
							| 232 | 53 231 | ltaddrpd |  | 
						
							| 233 | 53 | recnd |  | 
						
							| 234 | 233 | 2timesd |  | 
						
							| 235 | 232 234 | breqtrrd |  | 
						
							| 236 | 53 230 16 235 5 | ltletrd |  | 
						
							| 237 |  | difrp |  | 
						
							| 238 | 53 16 237 | syl2anc |  | 
						
							| 239 | 236 238 | mpbid |  | 
						
							| 240 | 239 | rprecred |  | 
						
							| 241 | 3 | nnrecred |  | 
						
							| 242 | 240 241 | resubcld |  | 
						
							| 243 | 53 242 | remulcld |  | 
						
							| 244 | 222 | fveq1d |  | 
						
							| 245 | 244 | fveq2d |  | 
						
							| 246 | 245 | adantr |  | 
						
							| 247 |  | nfv |  | 
						
							| 248 |  | nfcv |  | 
						
							| 249 |  | nffvmpt1 |  | 
						
							| 250 | 248 249 | nffv |  | 
						
							| 251 |  | nfcv |  | 
						
							| 252 |  | nfcv |  | 
						
							| 253 | 250 251 252 | nfbr |  | 
						
							| 254 | 247 253 | nfim |  | 
						
							| 255 |  | eleq1w |  | 
						
							| 256 | 255 | anbi2d |  | 
						
							| 257 |  | 2fveq3 |  | 
						
							| 258 | 257 | breq1d |  | 
						
							| 259 | 256 258 | imbi12d |  | 
						
							| 260 |  | simpr |  | 
						
							| 261 | 225 | fvmpt2 |  | 
						
							| 262 | 260 224 261 | sylancl |  | 
						
							| 263 | 262 | fveq2d |  | 
						
							| 264 | 164 189 192 | subdid |  | 
						
							| 265 | 164 | mulridd |  | 
						
							| 266 | 164 192 | mulcomd |  | 
						
							| 267 | 265 266 | oveq12d |  | 
						
							| 268 | 264 267 | eqtr2d |  | 
						
							| 269 | 268 | fveq2d |  | 
						
							| 270 | 161 162 163 | absdivd |  | 
						
							| 271 | 16 | adantr |  | 
						
							| 272 | 65 | adantr |  | 
						
							| 273 | 271 272 | absidd |  | 
						
							| 274 | 273 | oveq2d |  | 
						
							| 275 | 270 274 | eqtrd |  | 
						
							| 276 | 275 | oveq1d |  | 
						
							| 277 | 189 192 | subcld |  | 
						
							| 278 | 164 277 | absmuld |  | 
						
							| 279 | 69 | adantr |  | 
						
							| 280 | 279 | recnd |  | 
						
							| 281 | 277 | abscld |  | 
						
							| 282 | 281 | recnd |  | 
						
							| 283 | 280 282 162 163 | div23d |  | 
						
							| 284 | 276 278 283 | 3eqtr4d |  | 
						
							| 285 | 263 269 284 | 3eqtrd |  | 
						
							| 286 | 53 | adantr |  | 
						
							| 287 | 240 | adantr |  | 
						
							| 288 | 241 | adantr |  | 
						
							| 289 | 287 288 | resubcld |  | 
						
							| 290 | 271 289 | remulcld |  | 
						
							| 291 | 15 | absge0d |  | 
						
							| 292 | 291 | adantr |  | 
						
							| 293 | 277 | absge0d |  | 
						
							| 294 | 79 | adantr |  | 
						
							| 295 | 239 | adantr |  | 
						
							| 296 | 231 | adantr |  | 
						
							| 297 | 295 296 | rpdivcld |  | 
						
							| 298 | 14 | dmgmn0 |  | 
						
							| 299 | 298 | adantr |  | 
						
							| 300 | 161 162 299 163 | divne0d |  | 
						
							| 301 |  | eliooord |  | 
						
							| 302 | 301 | adantl |  | 
						
							| 303 | 302 | simpld |  | 
						
							| 304 | 303 | gt0ne0d |  | 
						
							| 305 | 164 167 300 304 | mulne0d |  | 
						
							| 306 | 168 305 | reccld |  | 
						
							| 307 | 189 306 | addcld |  | 
						
							| 308 | 168 189 168 305 | divdird |  | 
						
							| 309 | 168 305 | dividd |  | 
						
							| 310 | 309 | oveq1d |  | 
						
							| 311 | 308 310 | eqtrd |  | 
						
							| 312 | 190 168 191 305 | divne0d |  | 
						
							| 313 | 311 312 | eqnetrrd |  | 
						
							| 314 | 307 313 | absrpcld |  | 
						
							| 315 |  | 1red |  | 
						
							| 316 |  | 0le1 |  | 
						
							| 317 | 316 | a1i |  | 
						
							| 318 | 297 | rpred |  | 
						
							| 319 | 306 | negcld |  | 
						
							| 320 | 319 | abscld |  | 
						
							| 321 | 320 315 | resubcld |  | 
						
							| 322 | 307 | abscld |  | 
						
							| 323 | 233 | adantr |  | 
						
							| 324 | 296 | rpne0d |  | 
						
							| 325 | 162 323 323 324 | divsubdird |  | 
						
							| 326 | 323 324 | dividd |  | 
						
							| 327 | 326 | oveq2d |  | 
						
							| 328 | 325 327 | eqtrd |  | 
						
							| 329 | 271 296 | rerpdivcld |  | 
						
							| 330 | 323 162 324 163 | recdivd |  | 
						
							| 331 | 166 92 | sylan2 |  | 
						
							| 332 | 168 305 | absrpcld |  | 
						
							| 333 | 64 | adantr |  | 
						
							| 334 | 296 333 | rpdivcld |  | 
						
							| 335 | 332 334 | lerecd |  | 
						
							| 336 | 331 335 | mpbid |  | 
						
							| 337 | 330 336 | eqbrtrrd |  | 
						
							| 338 | 306 | absnegd |  | 
						
							| 339 | 189 168 305 | absdivd |  | 
						
							| 340 |  | abs1 |  | 
						
							| 341 | 340 | oveq1i |  | 
						
							| 342 | 339 341 | eqtrdi |  | 
						
							| 343 | 338 342 | eqtrd |  | 
						
							| 344 | 337 343 | breqtrrd |  | 
						
							| 345 | 329 320 315 344 | lesub1dd |  | 
						
							| 346 | 328 345 | eqbrtrd |  | 
						
							| 347 | 340 | oveq2i |  | 
						
							| 348 | 319 189 | abs2difd |  | 
						
							| 349 | 347 348 | eqbrtrrid |  | 
						
							| 350 | 189 306 | addcomd |  | 
						
							| 351 | 350 | negeqd |  | 
						
							| 352 | 306 189 | negdi2d |  | 
						
							| 353 | 351 352 | eqtrd |  | 
						
							| 354 | 353 | fveq2d |  | 
						
							| 355 | 307 | absnegd |  | 
						
							| 356 | 354 355 | eqtr3d |  | 
						
							| 357 | 349 356 | breqtrd |  | 
						
							| 358 | 318 321 322 346 357 | letrd |  | 
						
							| 359 | 297 314 315 317 358 | lediv2ad |  | 
						
							| 360 | 17 233 | subcld |  | 
						
							| 361 | 360 | adantr |  | 
						
							| 362 | 53 236 | gtned |  | 
						
							| 363 | 17 233 362 | subne0d |  | 
						
							| 364 | 363 | adantr |  | 
						
							| 365 | 361 323 364 324 | recdivd |  | 
						
							| 366 | 162 323 | nncand |  | 
						
							| 367 | 366 | oveq1d |  | 
						
							| 368 | 162 361 361 364 | divsubdird |  | 
						
							| 369 | 367 368 | eqtr3d |  | 
						
							| 370 | 361 364 | dividd |  | 
						
							| 371 | 370 | oveq2d |  | 
						
							| 372 | 365 369 371 | 3eqtrd |  | 
						
							| 373 | 359 372 | breqtrd |  | 
						
							| 374 | 190 189 190 191 | divsubdird |  | 
						
							| 375 | 168 189 | pncand |  | 
						
							| 376 | 375 | oveq1d |  | 
						
							| 377 | 190 191 | dividd |  | 
						
							| 378 | 377 | oveq1d |  | 
						
							| 379 | 374 376 378 | 3eqtr3rd |  | 
						
							| 380 | 190 168 191 305 | recdivd |  | 
						
							| 381 | 311 | oveq2d |  | 
						
							| 382 | 379 380 381 | 3eqtr2d |  | 
						
							| 383 | 382 | fveq2d |  | 
						
							| 384 | 189 307 313 | absdivd |  | 
						
							| 385 | 340 | oveq1i |  | 
						
							| 386 | 384 385 | eqtrdi |  | 
						
							| 387 | 383 386 | eqtrd |  | 
						
							| 388 | 360 363 | reccld |  | 
						
							| 389 | 388 | adantr |  | 
						
							| 390 | 241 | recnd |  | 
						
							| 391 | 390 | adantr |  | 
						
							| 392 | 162 389 391 | subdid |  | 
						
							| 393 | 162 361 364 | divrecd |  | 
						
							| 394 | 393 | eqcomd |  | 
						
							| 395 | 162 163 | recidd |  | 
						
							| 396 | 394 395 | oveq12d |  | 
						
							| 397 | 392 396 | eqtrd |  | 
						
							| 398 | 373 387 397 | 3brtr4d |  | 
						
							| 399 | 279 286 281 290 292 293 294 398 | lemul12ad |  | 
						
							| 400 | 242 | recnd |  | 
						
							| 401 | 400 | adantr |  | 
						
							| 402 | 323 162 401 | mul12d |  | 
						
							| 403 | 399 402 | breqtrd |  | 
						
							| 404 | 279 281 | remulcld |  | 
						
							| 405 | 243 | adantr |  | 
						
							| 406 | 404 405 333 | ledivmuld |  | 
						
							| 407 | 403 406 | mpbird |  | 
						
							| 408 | 285 407 | eqbrtrd |  | 
						
							| 409 | 254 259 408 | chvarfv |  | 
						
							| 410 | 246 409 | eqbrtrd |  | 
						
							| 411 | 8 9 147 227 243 410 | dvlip |  | 
						
							| 412 | 6 7 411 | mpanr12 |  | 
						
							| 413 |  | eqidd |  | 
						
							| 414 |  | oveq2 |  | 
						
							| 415 | 414 178 | sylan9eqr |  | 
						
							| 416 | 415 | fvoveq1d |  | 
						
							| 417 | 415 416 | oveq12d |  | 
						
							| 418 | 6 | a1i |  | 
						
							| 419 |  | ovexd |  | 
						
							| 420 | 413 417 418 419 | fvmptd |  | 
						
							| 421 |  | oveq2 |  | 
						
							| 422 | 19 | mul01d |  | 
						
							| 423 | 421 422 | sylan9eqr |  | 
						
							| 424 | 423 | oveq1d |  | 
						
							| 425 |  | 0p1e1 |  | 
						
							| 426 | 424 425 | eqtrdi |  | 
						
							| 427 | 426 | fveq2d |  | 
						
							| 428 |  | log1 |  | 
						
							| 429 | 427 428 | eqtrdi |  | 
						
							| 430 | 423 429 | oveq12d |  | 
						
							| 431 |  | 0m0e0 |  | 
						
							| 432 | 430 431 | eqtrdi |  | 
						
							| 433 | 7 | a1i |  | 
						
							| 434 | 413 432 433 433 | fvmptd |  | 
						
							| 435 | 420 434 | oveq12d |  | 
						
							| 436 | 19 138 | addcld |  | 
						
							| 437 | 14 3 | dmgmdivn0 |  | 
						
							| 438 | 436 437 | logcld |  | 
						
							| 439 | 19 438 | subcld |  | 
						
							| 440 | 439 | subid1d |  | 
						
							| 441 | 435 440 | eqtr2d |  | 
						
							| 442 | 441 | fveq2d |  | 
						
							| 443 |  | 1m0e1 |  | 
						
							| 444 | 443 | fveq2i |  | 
						
							| 445 | 444 340 | eqtri |  | 
						
							| 446 | 445 | oveq2i |  | 
						
							| 447 | 233 400 | mulcld |  | 
						
							| 448 | 447 | mulridd |  | 
						
							| 449 | 446 448 | eqtr2id |  | 
						
							| 450 | 412 442 449 | 3brtr4d |  |