f 21 = Φ 2 A 2 M 1 = g A 2 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadAgadaWgaaWcbaGaaGOmaiaaigdaaeqaaOGaeyypa0ZaaSaaaeaacqqHMoGrdaWgaaWcbaGaaGOmaaqabaaakeaacaWGbbWaaSbaaSqaaiaaikdaaeqaaOGaamytamaaBaaaleaacaaIXaaabeaaaaGccqGH9aqpdaWcaaqaaiaadEgaaeaacaWGbbWaaSbaaSqaaiaaikdaaeqaaaaaaaa@4295@ ; A 2 f 21 =g= A 1 f 12 MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGeaGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaqFn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpeWZqaaiqaciWacmGadaGadeaabaGaaqaaaOqaaiaadgeadaWgaaWcbaGaaGOmaaqabaGccaWGMbWaaSbaaSqaaiaaikdacaaIXaaabeaakiabg2da9iaadEgacqGH9aqpcaWGbbWaaSbaaSqaaiaaigdaaeqaaOGaamOzamaaBaaaleaacaaIXaGaaGOmaaqabaaaaa@40DD@
unit : 1