When I type these,
B={{1,2},{3,4}}
Norm[N[B]]
the output is,
{{1, 2}, {3, 4}}
5.46499
But in old textbook, the command
MatrixNorm[N[B]]
is 7.(This command is not used anymore now but I cannot find the substitute for this :( )
How can I get this result?
Nice day!
