Abstract
The conditions under which gas cloud collisions can induce star formation in protogalaxies or young galaxies are discussed. The specific case of fast collisions between metal-free, warm, atomic gas clouds has an enhanced chance of inducing star formation as a result of H/sub 2/ molecule formation and molecular cooling. This case is an exception to the rule that fast (>>Mach 1) isothermal cloud collisions lead to cloud disruption. Subject headings: galaxies: formation: stars: formation: hydrodynamics
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