statistical studies on palynology contents of late cretaceous to paleocene age gurpi formation in a surface section in zagros basin,sw iran indicate changes in abundance, species diversity, ratio of spiniferites to cyclonephelium (s/c), palynological marine index(pmi) values and organic facies. these palynological variations clearly reflect fluctuations in relative sea-level and depositionalenv...

Using basic identities, Lucas proved Theorem 0 in the first of his two 1878 articles in which he developed the general theory of second-order linear recurrences [5]; Lucas had previously proven parts (i) and (iii) in his 1875 article [4], Nearly four decades later, Carmichael [1] used the theory of cyclotomic polynomials to obtain both new results and results confirming and generalizing many of...