│ ┌─┐ ┌─┐ ▂▃▂
/│╲ │ ├─┤ │ ├─┤ ◥█ ◣
┘ ─┼─├─┘─┼─├─┘ ▊ ▊
▆▆▆ ▆ ▆▆ ▆▆▆ /│╲│┼╮/│╲│┼╮◣ ◢ ▉
█▆█ █ ▊█ ◢██ ▊▊█ █▆█ └╯└〒▽〒└╯└◥ ◤
█ ██ ██ ◥▆▆ ███ ◢◤█ 摸狗狗退散 ▇▅▄▆
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※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.218.142
Show that the subsequential limits of a sequence {x_n} forms a
closed set of a metric space X if {x_n} in X.
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