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Compound of four triangular prisms
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<h2 id="cartesian-coordinates">Cartesian coordinates</h2> <p><a href="/facts/Cartesian_coordinates/lkTqvMmB">Cartesian coordinates</a> for the vertices of this compound are all the <a href="/facts/Even_permutation/ludhCMJz">even permutations</a> of </p> (±1, ±(1+√2), ±(1−√2)) <p>with an even number of minuses in the '±' choices, together with all the odd permutations with an odd number of minuses in the '±' choices. </p> <ul><li>Skilling, John (1976), "Uniform Compounds of Uniform Polyhedra", <i><a href="/facts/Mathematical_Proceedings_of_the_Cambridge_Philosophical_Society/KUUzcS7S">Mathematical Proceedings of the Cambridge Philosophical Society</a></i>, 79 (3): 447–457, <a href="/facts/Doi_(identifier)/muM9Etpq">doi</a>:<a href="https://doi.org/10.1017%2FS0305004100052440">10.1017/S0305004100052440</a>, <a href="/facts/MR_(identifier)/uP137L11">MR</a> <a href="https://mathscinet.ams.org/mathscinet-getitem?mr=0397554">0397554</a>.</li></ul>