Question Number 101961 by Study last updated on 05/Jul/20
Commented by mr W last updated on 05/Jul/20
$${n}\left({E}\right)=\mathrm{0} \\ $$
Commented by Study last updated on 05/Jul/20
$${what}\:{is}\:{the}\:{cardinal}\:{number}\:{the}\:{above}\: \\ $$$${set}? \\ $$
Commented by Study last updated on 05/Jul/20
$${why}? \\ $$
Commented by mr W last updated on 05/Jul/20
$${there}\:{is}\:{no}\:{number}\:{x}\:{satisfing} \\ $$$${x}\in{W}\:{and}\:{x}<\mathrm{0} \\ $$