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