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  2. Mass–energy equivalence - Wikipedia

    en.wikipedia.org/wiki/Mass–energy_equivalence

    For an observer in the rest frame, removing energy is the same as removing mass and the formula m = E/c 2 indicates how much mass is lost when energy is removed. [8] In the same way, when any energy is added to an isolated system, the increase in the mass is equal to the added energy divided by c 2. [9]

  3. Energy–momentum relation - Wikipedia

    en.wikipedia.org/wiki/Energy–momentum_relation

    Einstein Triangle. The energy–momentum relation is consistent with the familiar mass–energy relation in both its interpretations: E = mc 2 relates total energy E to the (total) relativistic mass m (alternatively denoted m rel or m tot), while E 0 = m 0 c 2 relates rest energy E 0 to (invariant) rest mass m 0.

  4. Pyraminx Duo - Wikipedia

    en.wikipedia.org/wiki/Pyraminx_Duo

    The above table shows that the God's Number of the Pyraminx Duo is 4 (i.e. the puzzle is always at most 4 twists away from its solved state). Similarly to the total number of combinations, this number is very low compared to the Rubik's Cube (20), the Pocket Cube (11) or the Pyraminx (11, excluding the trivial tips).

  5. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The conjecture is that there is a simple way to tell whether such equations have a finite or infinite number of rational solutions. More specifically, the Millennium Prize version of the conjecture is that, if the elliptic curve E has rank r, then the L-function L(E, s) associated with it vanishes to order r at s = 1.

  6. Cubic pyramid - Wikipedia

    en.wikipedia.org/wiki/Cubic_pyramid

    In 4-dimensional geometry, the cubic pyramid is bounded by one cube on the base and 6 square pyramid cells which meet at the apex. Since a cube has a circumradius divided by edge length less than one, [ 1 ] the square pyramids can be made with regular faces by computing the appropriate height.

  7. Mechanical puzzle - Wikipedia

    en.wikipedia.org/wiki/Mechanical_puzzle

    A pyramid puzzle consists of two or more component pieces which fit together to create a pyramid. [1] [2] Two-piece pyramid puzzles cannot form a regular pyramid and can only form a 4 faced tetrahedron pyramid. The solution involves facing the square faces to each other and twisting one upright to complete the four faced tetrahedronic pyramid. [3]

  8. Pyraminx - Wikipedia

    en.wikipedia.org/wiki/Pyraminx

    Pyraminx in its solved state. The Pyraminx (/ ˈ p ɪ r ə m ɪ ŋ k s /) is a regular tetrahedron puzzle in the style of Rubik's Cube.It was made and patented by Uwe Mèffert after the original 3 layered Rubik's Cube by Ernő Rubik, and introduced by Tomy Toys of Japan (then the 3rd largest toy company in the world) in 1981.

  9. Pyramorphix - Wikipedia

    en.wikipedia.org/wiki/Pyramorphix

    Four of the cube's corners are reshaped into pyramids and the other four are reshaped into triangles. The result of this is a puzzle that changes shape as it is turned. The original name for the Pyramorphix was "The Junior Pyraminx." This was altered to reflect the "Shape Changing" aspect of the puzzle which makes it appear less like the 2×2× ...