We are concerned with both regular and degenerate first-order identification problems related to systems of differential equations of weakly parabolic type in Banach spaces. Several applications to partial differential equations and systems will be given in a subsequent paper to show the fullness of our abstract results.
"First-Order Regular and Degenerate Identification Differential Problems." Abstr. Appl. Anal. 2015 (SI06) 1 - 42, 2015. https://doi.org/10.1155/2015/393624