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Extend Axis with singleton dimensions and replace ⊖ with ⌽₀ - #147
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November 12, 2026 10:49
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Axis now adds trailing singleton view dimensions when a nonnegative axis lies beyond the data's rank. Catenate, replicate, take, folds and ordinary functions share this behavior. Negative axes keep selecting existing axes, and control arguments and Mix retain their meanings. First-axis reversal and rotation use ⌽₀ instead of the removed ⊖ primitive. Keyboard tables, editor support, libraries and examples follow the new spelling.
This also fixes reverse-mode differentiation through replicated reads whose walk axes differ from their logical result axes. See Axis, Reverse / Rotate, and llms.txt.