Szukana fraza: [Abstract = "Individuals were of two types\: preys \(with free exponential population growth\) and predators \(with exponential population decrease in the absence of a prey, they attack with probability one and are characterized by zero handling and gestation times\). Therefore the system might be also interpreted as a chemical reaction in a gas. For this simple system, a spontaneous generation of complex spatio\-temporal pattern was observed with wavy spatial patterns and tendency for preys to form clusters surrounded by predators if the population density was high."]

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