Muffin-tin approximation Muffin-tin approximation The muffin-tin approximation is a shape approximation of the potential well in an crystal lattice. It is most commonly employed in quantum mechanical simulations of the electronic band structure in solids. The approximation was proposed by John C. Slater. Augmented plane wave method (APW) is a method which uses muffin-tin approximation. It is a method to approximate the energy states of an electron in a crystal lattice. The basic approximation lies in the potential in which the potential is assumed to be spherically symmetric in the muffin-tin region and constant in the interstitial region. Wave functions (the augmented
ROH 15th Anniversary Show of Honor Wrestling". Wrestlers portrayed heroes (faces) or villains (heels) as they followed a series of events that built tension and culminated in a wrestling match or series of matches. ROH 15th Anniversary Show ROH 15th Anniversary was the two-night 15th ROH Anniversary Show professional wrestling pay-per-view (PPV) event produced by the American wrestling promotion Ring of Honor. It took place on March 10 and 11, 2017, at the Sam's Town Live in the Las Vegas suburb of Sunrise Manor, Nevada. The first night was a pay-per-view broadcast, while the following night was a set of tapings for the ROH