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<!DOCTYPE html> <html> <head> <title>embellished operators: maction and mrow-like as space-like children </title> </head> <body> <div> <!-- space-like mrow --> <math xmlns="http://www.w3.org/1998/Math/MathML"> <mover> <mtext>abcdef</mtext> <mrow><mrow><mspace/></mrow><mo>¯</mo></mrow> </mover> </math> </div> </body> </html>