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| Clyde_Davenport\'s_Commutative_Hypercomplex_Mathematics Summary and application as it relates to electromagnetic theory and special relativity. |
| Complex_Geometry_of_Nature_and_General_Relativity A paper by Giampiero Esposito attempting to give a self-contained introduction to holomorphic ideas in general relativity. The main topics are complex manifolds, spinor and twistor methods, heaven spa |
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| Holomorphic_Methods_in_Mathematical_Physics This set of lecture notes by Brian C. Hall gives an introduction to holomorphic function spaces as used in mathematical physics. The emphasis is on the Segal-Bargmann space and the canonical commutati |
| Homological_Methods_in_Mathematical_Physics These lecture notes by Joseph Krasil'shchik and Alexander Verbovetsky are a systematic and self-contained exposition of the cohomological theories naturally related to partial differential equations. |
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| Mathematical_Methods_I This site contains the complete lecture notes and homework sets for PHYCS498MMA, a course of mathematical methods for physics given to entering graduate students, and senior undergraduates, at the |
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| Period_and_energy_in_one_degree_of_freedom_systems An article by Jorge Rezende, University of Lisbon (PDF). |
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Steamboat Geyser in steam phase on May 2, 2000 at 10:00 AM (5:00 AM eruption); Norris Geyser Basin; NPS photo (Tom Cawley) 
Geysers are rare. According to Geyser World there are approximately 1000 active geysers in the world, with about 500 of them being in Yellowstone National Park. For a listing of active, dormant and exinct geyser one should visit Johnston's Archive Geyser Resources. In order for a geyser to form, three conditions must be met:1. an abundant supply of water2. a heat source3. special plumbingThe problem is the special plumbing. Most geysers are found in the volcanic rock rhyolite, a high silica rock. Fields of rhyolite are rare hence geysers are rare. The site, “Geyser World”, goes on to give a readable explanation of what happens before and during an eruption. Geysers and the Earth's Plumbing System also explains what factors are needed for a geyser to exist and how a geyser erupts. Some of the links on this page do not work but it is well worth a visit. A cross-sectional diagram illustrates the three conditions that must be met to get geyser activity - heat, water and a reservoir. There are pictures of six basic type of plumbing systems that a geyser might have. The discussion after that gets more scientific in nature.I have seen WyoJones' Geyser site referred to as the best geyser site on the web. There is a lot of useful information, most notably a section on the continuing survival of geysers. Geysers are temporary geological features. Many factors (either natural or man made) can alter or destroy them. Here, one can find out what dangers geysers have faced and what the greatest threat to their existence is right now. There is a list of geyser that have been damaged or destroyed. It is really a shame.Is it possible to visit a geyser online? Sure! And where else would one go but to Yellowstone National Park. This is a great site. The tour starts with a visit to the various basins. A geyser basin is just an area that contains a group of geysers. After having finished strolling around the basins, it continues on stopping at each geyser individually. There are movies showing each geyser erupting. Or, one can visit National Park Service's Yellowstone National Park and take in the online nature tours.
Old Faithful Geyser; Upper Geyser Basin; NPS Photo (Jim Peaco)
Yellowstone Caldera map 
