Measuring the Efficiency and Productivity of Cement Companies in the Tehran Stock Exchange Using Data Envelopment Analysis and Malmquist Productivity Index in Gray Environment by Farjam Kayedppour, Shadi Sayadmanesh, Yasamin Salmani, Zahra Sadeghi

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The Results on the Existence of Fixed Points in Hilbert Spaces via Functions of Class $C$ by Mana Donganont, Arsalan Ansari, Snjezana Maksimovic, Zoran Mitrovic

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Exploring α−ψ−ϕ contractive mapping: novel fixed point theorems in complete b-metric spaces [version 2; peer review: 2 approved, 1 approved with reservations] by Maysoon Qousini, Berhanu Seboka, Fikadu Tesgera Tolasa, Gudeta Hanchalu, Nasir Ali, Tamene Raji

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Evaluating a distance function by Abgrall, Rémi

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Cropland non-agriculturization and agricultural green development: Evidence from the Yangtze River Economic Belt, China by Chunxia Zhu, Yangyang Sun, Haolun Xu

Subjects: “…Non-radial directional distance function…”
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