We introduce and study higher-order coalition logic, a multi modal monadic second-order logic with operators [{x}ψ]Φ expressing that the coalition of all agents satisfying ψ(x) can achieve a state in which Φ holds. We use neighborhood semantics to model extensive games of perfect information with simultaneous actions and we provide a framework reasoning about agents in the same way as it is reasoning about their abilities. We illustrate higher-order coalition logic to represent and reason about coalition formation and cooperation, we show a more general and expressive way to quantify over coalitions than quantified coalition logic, we give an axiomatization and prove completeness.
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