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  2. Empty set - Wikipedia

    en.wikipedia.org/wiki/Empty_set

    In mathematics, the empty set or void set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero. [1] Some axiomatic set theories ensure that the empty set exists by including an axiom of empty set , while in other theories, its existence can be deduced.

  3. Tic-tac-toe variants - Wikipedia

    en.wikipedia.org/wiki/Tic-tac-toe_variants

    [26] [28] If all the numbers are used and no one gets three numbers that add up to 15 then the game is a draw. [26] Plotting these numbers on a 3×3 magic square shows that the game exactly corresponds with tic-tac-toe, since three numbers will be arranged in a straight line if and only if they total 15. [29]

  4. Help:Table - Wikipedia

    en.wikipedia.org/wiki/Help:Table

    tabulate, Python module for converting data structures to wiki table markup; wikitables, Python module for reading wiki table markup; H63: Using the scope attribute to associate header cells and data cells in data tables | Techniques for WCAG 2.0. Tables | Usability & Web Accessibility. Yale University. Tables with Multi-Level Headers.

  5. Primitive data type - Wikipedia

    en.wikipedia.org/wiki/Primitive_data_type

    Byte, octet, minimum size of char in C99( see limits.h CHAR_BIT) −128 to +127 0 to 255 2 bytes 16 bits x86 word, minimum size of short and int in C −32,768 to +32,767 0 to 65,535 4 bytes 32 bits x86 double word, minimum size of long in C, actual size of int for most modern C compilers, [8] pointer for IA-32-compatible processors

  6. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  7. Tree (abstract data type) - Wikipedia

    en.wikipedia.org/wiki/Tree_(abstract_data_type)

    The number of edges along the shortest path between two nodes. Level The level of a node is the number of edges along the unique path between it and the root node. [4] This is the same as depth. Width The number of nodes in a level. Breadth The number of leaves. Forest A set of one or more disjoint trees. Ordered tree

  8. Bucket sort - Wikipedia

    en.wikipedia.org/wiki/Bucket_sort

    Bucket sort can be seen as a generalization of counting sort; in fact, if each bucket has size 1 then bucket sort degenerates to counting sort. The variable bucket size of bucket sort allows it to use O(n) memory instead of O(M) memory, where M is the number of distinct values; in exchange, it gives up counting sort's O(n + M) worst-case behavior.

  9. Null set - Wikipedia

    en.wikipedia.org/wiki/Null_set

    Every finite or countably infinite subset of the real numbers ⁠ ⁠ is a null set. For example, the set of natural numbers ⁠ ⁠, the set of rational numbers ⁠ ⁠ and the set of algebraic numbers ⁠ ⁠ are all countably infinite and therefore are null sets when considered as subsets of the real numbers.