Abstract
We prove the existence and nonexistence of global generalized (nonnegative) solutions of the nonlinearly degenerate wave equations vtt=c(|v|s−1v)xx with the nonnegative initial data v0(x) and s>1. These results are extensions of the results in the second author’s paper (Sugiyama, 2016), where the existence and the nonexistence of the unique global classical solution were studied with a threshold on ∫−∞∞v1(x)dx and the non-degeneracy condition v0(x)≥c0>0 on the initial data.
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