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$\Sigma^0_1\wedge\Pi^0_1$-Determinacy holds in the second admissible above the game

I am aware that $\Sigma^0_1\wedge\Pi^0_1$-Determinacy is proved all the way back by Gale and Stewart from ZFC, so I'm specifically interested in the version with the weaker hypothesis. …
Chris Le Sueur's user avatar