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  2. Tree rotation - Wikipedia

    en.wikipedia.org/wiki/Tree_rotation

    The tree rotation renders the inorder traversal of the binary tree invariant. This implies the order of the elements is not affected when a rotation is performed in any part of the tree. Here are the inorder traversals of the trees shown above: Left tree: ((A, P, B), Q, C) Right tree: (A, P, (B, Q, C))

  3. Right rotation - Wikipedia

    en.wikipedia.org/wiki/Right_rotation

    This rotation assumes that X has a left child (or subtree). X's left child, R, becomes X's parent node and R's right child becomes X's new left child. This rotation is done to balance the tree; specifically when the left subtree of node X has a significantly (depending on the type of tree) greater height than its right subtree.

  4. Rotation distance - Wikipedia

    en.wikipedia.org/wiki/Rotation_distance

    A rotation operates on two nodes x and y, where x is the parent of y, and restructures the tree by making y be the parent of x and taking the place of x in the tree. To free up one of the child links of y and make room to link x as a child of y , this operation may also need to move one of the children of y to become a child of x .

  5. Tree structure - Wikipedia

    en.wikipedia.org/wiki/Tree_structure

    A tree structure, tree diagram, or tree model is a way of representing the hierarchical nature of a structure in a graphical form. It is named a "tree structure" because the classic representation resembles a tree, although the chart is generally upside down compared to a biological tree, with the "stem" at the top and the "leaves" at the bottom.

  6. AVL tree - Wikipedia

    en.wikipedia.org/wiki/AVL_tree

    In case of a deletion, the leaf layer was at level h+2 and after the double rotation it is at level h+1, so that the height of the rotated tree decreases. Fig. 3: Double rotation rotate_RightLeft(X,Z) = rotate_Right around Z followed by rotate_Left around X Code snippet of a right-left double rotation

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  8. Left rotation - Wikipedia

    en.wikipedia.org/wiki/Left_rotation

    This rotation assumes that X has a right child (or subtree). X's right child, R, becomes X's parent node and R's left child becomes X's new right child. This rotation is done to balance the tree; specifically when the right subtree of node X has a significantly (depends on the type of tree) greater height than its left subtree.

  9. 270 Reasons Women Choose Not To Have Children - The ...

    data.huffingtonpost.com/2015/07/choosing...

    Far too often, women who choose to be childfree are asked to defend their “immature,” “selfish” lifestyles. They’re told that motherhood is the “most important job in the world” and face accusations of living “meaningless” lives.