we consider the fundamental relation  on a semihypergroup  to interpret the lower and upper approximations as subsets of the fundamental semigroup  and we give some results in this connection. also, we introduce the notion of a bi-hyperideal to study the relationship between approximations and bi-hyperideals.

Culture-independent methods in microbiology (quantitative PCR (qPCR), sequencing, microarrays, direct from sample matrix assisted laser desorption/ionization time of flight mass spectroscopy (MALDI-TOF MS), etc.) are disruptive technology. Rather than providing the same results as culture-based methods more quickly, more cheaply or with improved accuracy, they reveal an unexpected diversity of ...

With the rapid development of social science and technology civilization, acceleration urbanization, requirements urban landscape planning design are also paying more attention to concept “adopting measures local conditions putting people first”. Therefore, inheritance innovation based on culture that can represent characteristics is a respect for traditional regional culture, integration new e...