Ivan G. Ivanov

Cournot and Stackelberg Equilibria in an Asymmetric Duopoly

Ivan G. Ivanov & Tonya Mateva · Journal of Advances in Mathematics and Computer Science · 2016

Aims/Objectives: To study an asymmetric duopoly in gas market where two players produce a homogeneous commodity. One of the players maximizes its profit, while the other- its revenue. The asymmetry also includes a security constraint, saying that the revenue- maximizing player ca...

Open access Research Article 10.9734/BJMCS/2016/25705

Polyphenols Content and Antioxidant Activity of Bilberry Juice Obtained from Different Altitude Samples

Stoyan I. Papanov, Ekaterina G. Petkova & Ivan G. Ivanov · Journal of Pharmaceutical Research International · 2021

There are about 30 different types of blueberries. In Bulgaria, there are 4 species of genus Vaccinium - red (vitis-idaea), black (myrtillus), blue (uliginosum) and Caucasian (arctostaphylos). Bilberries are a source of carotene, vitamin B1, vitamin B2, potassium, sodium, calcium...

Open access Research Article 10.9734/jpri/2021/v33i29A31581