您即將離開本站

查詢「q is countable」的人也找了：

• Show that q is a countable set
• Q is countable
• Rational number is countable
• Show that the set Q of rational numbers is countable
• Countable union of countable sets is countable
• At most countable
• Let X and Y be countable sets show that X ∪ Y is countable
• Countable collection