A tribute to Zadeh’s extension principle

A Tribute to Late Professor Mahlagha Ghorbanli

This edition of IJPP celebrates ten years of steady publication of Iranian Journal of Plant Physiology. The story of IJPP is that of a journey that started from a local forum where the researchers and scholars mainly from the Islamic Azad University could share findings of their studies, gradually developing into an international peer-reviewed jour...

Membrane Science and Research: A Tribute to Professor Takeshi Matsuura

Fuzzy tonnage-average grade model based on extension principle

Due to the nature of the geological and mining activities, different input parameters in the grade estimation and mineral resource evaluation are always tainted with uncertainties. It is possible to investigate the uncertainties related to the measurements and parameters of the variogram model using the fuzzy kriging method instead of the kriging method. The fuzzy kriging theory has already bee...

A Tribute to Jan

Returning to the University of Uppsala after 1 year in ON DECEMBER 1, 1996, the world lost one of this century’s giants in hematology. Jan Gosta WaldenMunich, he studied diseases associated with an elevation of the erythrocyte sedimentation rate (ESR). Waldenström ström was born the son and grandson of physicians in Stockholm, Sweden, on April 17, 1906. During his long and distindescribed three...

A note on Zadeh's extension principle

For a mapping, fuzzy sets obtained by Zadeh's extension principle are images of other fuzzy sets on the domain of the mapping under the mapping. Some relationships between images of level sets of one or two fuzzy sets under a mapping and another fuzzy set obtained from the one or two fuzzy sets by Zadeh's extension principle are known. In the present paper, the known results are extended to mor...