- #1
transgalactic
- 1,395
- 0
[tex]
\liminf _{n->\infty} x_n+\limsup _{n->\infty} y_n\leq \limsup _{n->\infty} (x_n+y_n)\leq\limsup _{n->\infty} x_n+\limsup _{n->\infty} y_n\\
[/tex]
proving the first part:
[tex]
\limsup _{n->\infty} (x_n+y_n)\leq\limsup _{n->\infty} x_n+\limsup _{n->\infty} y_n\\
[/tex]
lim sup is the supremum of all the limits of the subsequences
this is true because of some law regarding the sum of two subsequences
correct??
\liminf _{n->\infty} x_n+\limsup _{n->\infty} y_n\leq \limsup _{n->\infty} (x_n+y_n)\leq\limsup _{n->\infty} x_n+\limsup _{n->\infty} y_n\\
[/tex]
proving the first part:
[tex]
\limsup _{n->\infty} (x_n+y_n)\leq\limsup _{n->\infty} x_n+\limsup _{n->\infty} y_n\\
[/tex]
lim sup is the supremum of all the limits of the subsequences
this is true because of some law regarding the sum of two subsequences
correct??