Answer by Eric Wofsey for What does the notation $(\alpha^{+}\times...
The notation $(\alpha^{+}\times \alpha^{+})\setminus \{(\alpha,\alpha)\}$ just means exactly what it looks like: $\alpha^+\times \alpha^+$ is the Cartesian product $\{(x,y):x,y\in\alpha^+\}$. In...
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I would appreciate an explanation of what this means, where $\alpha\in \lambda$, and $\lambda$ is an infinite cardinal.$(\alpha^{+}\times \alpha^{+})\setminus \{(\alpha,\alpha)\}$I know $\alpha^{+}=...
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