Using the inclusion–exclusion principle, we derive a formula of generating functions for P-partitions related to ordinal sums of posets. This formula simplifies computations for many variations of plane partitions, such as plane partition polygons and plane partitions with diagonals or double diagonals. We illustrate our method by several examples, some of which are new variations of plane part...

We study error propagation through implicit geometric problems by linearizing and estimating the linearization error. The method is particularly useful for quadratic constraints, which turns out to be no big restriction for many geometric problems in applications.

in today's dynamic and uncertain environment, knowledge is a strategic source for organizations to gain the competitive advantage and innovation. in this research, we have investigated mediating role of knowledge management between environmental uncertainty and organizational innovation. data was collected through questionnaire from 89 large and medium sized manufacturing companies in suburb ma...