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  2. ∂ - Wikipedia

    en.wikipedia.org/wiki/%E2%88%82

    The boundary of a set in topology. The boundary operator on a chain complex in homological algebra. The boundary operator of a differential graded algebra. The conjugate of the Dolbeault operator on complex differential forms. The boundary ∂(S) of a set of vertices S in a graph is the set of edges leaving S, which defines a cut.

  3. Boundary (topology) - Wikipedia

    en.wikipedia.org/wiki/Boundary_(topology)

    A set (in light blue) and its boundary (in dark blue). In topology and mathematics in general, the boundary of a subset S of a topological space X is the set of points in the closure of S not belonging to the interior of S. An element of the boundary of S is called a boundary point of S.

  4. Dividing line between metals and nonmetals - Wikipedia

    en.wikipedia.org/wiki/Dividing_line_between...

    This line has been called the amphoteric line, [2] the metal-nonmetal line, [3] the metalloid line, [4] [5] the semimetal line, [6] or the staircase. [2] [n 1] While it has also been called the Zintl border [8] or the Zintl line [9] [10] these terms instead refer to a vertical line sometimes drawn between groups 13 and 14.

  5. Word boundary - Wikipedia

    en.wikipedia.org/wiki/Word_boundary

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  6. List of fractals by Hausdorff dimension - Wikipedia

    en.wikipedia.org/wiki/List_of_fractals_by...

    Hausdorff dimension (exact value) Hausdorff dimension (approx.) Name Illustration Remarks Calculated: 0.538: Feigenbaum attractor: The Feigenbaum attractor (see between arrows) is the set of points generated by successive iterations of the logistic map for the critical parameter value =, where the period doubling is infinite.

  7. Falkner–Skan boundary layer - Wikipedia

    en.wikipedia.org/wiki/Falkner–Skan_boundary_layer

    The basis of the Falkner-Skan approach are the Prandtl boundary layer equations. Ludwig Prandtl [2] simplified the equations for fluid flowing along a wall (wedge) by dividing the flow into two areas: one close to the wall dominated by viscosity, and one outside this near-wall boundary layer region where viscosity can be neglected without significant effects on the solution.

  8. Wikipedia : Manual of Style/Contents

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    Wikipedia:Manual of Style/Spelling (MOS:SPELLING) Not a guideline per se, but a handy guide to national varieties of English. Wikipedia:Manual of Style/Stand-alone lists (WP:STANDALONE) Goes into greater details than MOS:LISTS. Wikipedia:Manual of Style/Tables (WP:TABLES) The use and formatting of wikitables.

  9. Gemination - Wikipedia

    en.wikipedia.org/wiki/Gemination

    In phonetics and phonology, gemination (/ ˌ dʒ ɛ m ɪ ˈ n eɪ ʃ ən / ⓘ; from Latin geminatio 'doubling', itself from gemini 'twins' [1]), or consonant lengthening, is an articulation of a consonant for a longer period of time than that of a singleton consonant. [2]