U+20E6 COMBINING DOUBLE VERTICAL STROKE OVERLAY

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• =alias z notation finite function diacritic
• →cross-reference U+2016 ‖ DOUBLE VERTICAL LINE
• →cross-reference U+21FB ⇻ RIGHTWARDS ARROW WITH DOUBLE VERTICAL STROKE
• →cross-reference U+2901 ⤁ RIGHTWARDS TWO-HEADED ARROW WITH DOUBLE VERTICAL STROKE
• →cross-reference U+2915 ⤕ RIGHTWARDS ARROW WITH TAIL WITH DOUBLE VERTICAL STROKE