Abstract The first definition of space complexity for P systems was based on a hypothetical real implementation by means biochemical materials, and thus it assumes that every single object or membrane requires some constant physical space. This is equivalent to using unary encoding represent multiplicities each membrane. A different approach can also be considered, having in mind an silico; thi...

in this paper, several xed point theorems for t-contraction of two maps on cone metric spaces under normality condition are proved. obtained results extend and generalize well-known comparable results in the literature.

Data of four layers flocks (#31-34) from North Carolina Layer Performance and Management Test of the Department of Agriculture and Consumer Services were used in the meta-analysis to find if an increase in space allowance can affect egg production traits in white and brown layers. Effects of space allowance of 310 and 413 cm2/bird on layers performance were compared in this study. The increase ...