自函子自函子(Endofunctor)是一个将范畴映射到自身的函子(A functor that maps a category to itself)。函子是将一个范畴转换到另一个范畴,所以自函子是一种特殊的函子。 
由三部分组成:
  
  一组元素对象
  一组态射
  态射组合(二元运算)
  
如果这个范畴满足结合律,那么它是一个半群;如果半群满足幺元(单位元,identity),那么它是幺...
                            
                            
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其他好文   时间:
2016-03-01 13:02:17   
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                                素数 A prime is an integer greater than one whose only positive divisors are one and itself.整数的素因子分解是乘积等于此素数的集合。例如:3757208 = 2*2*2*7*13*13*397 public cl
                            
                            
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编程语言   时间:
2016-02-20 00:28:29   
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                                Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center). For example, this binary tree is symmetric: 1 / \ 2 2 /
                            
                            
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2016-01-30 17:51:16   
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                                interblock corruption: corruption blocks rather than within the block itself. can only be logical corruption. intrablock corruption: corruption wit...
                            
                            
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2016-01-25 14:30:05   
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                                Erlang doesn't detect net splits by itself. You could start looking atnet_kernel:set_net_ticktime/2 (try to increase this value if your node issufferi...
                            
                            
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其他好文   时间:
2016-01-23 18:17:05   
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                                Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 / \ ...
                            
                            
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其他好文   时间:
2016-01-18 22:37:44   
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                                题目描述:Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 ...
                            
                            
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编程语言   时间:
2016-01-13 19:16:50   
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                                题目:Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 / ...
                            
                            
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其他好文   时间:
2016-01-10 11:34:47   
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                                Symmetric TreeGiven a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric...
                            
                            
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编程语言   时间:
2015-12-31 19:20:46   
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                                问题描述:Given a binary tree, check whether it is a mirror of itself (ie, symmetric around its center).For example, this binary tree is symmetric: 1 ...
                            
                            
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编程语言   时间:
2015-12-18 10:20:26   
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