Dr. Ömer Kişi received the BSc degree from Cumhuriyet University, Sivas, Turkey in 2007; MS from Cumhuriyet University, Sivas, Turkey in 2010 and PhD degree in mathematical analysis worked with Fatih Nuray from Afyon Kocatepe University, Afyonkarahisar, Turkey in 2014. Started his career as an research assistant at Cumhuriyet University in 2009; then assistant professor at Bartın University, Bartın, Turkey in 2014. Since 2019, he has been a associate professor at the Department of Mathematics, Bartın, Turkey; his area of expertise includes summability theory, sequences spaces, and fuzzy sequence spaces through functional analysis.