... List of courses | Advanced courses . ... Introduction . ... Introduction to Commutative and Homological Algebra . ... 3.Typical singularities of mappings and Equivalence of singularities. ... 13.Resolution of singularities of algebraic varieties. ... Commutative and homological algebra studies algebraic structures, say, modules over commutative rings, in terms of their generators and relations. ... 1) M. F. Atiyah, I. G. McDonald, Introduction to commutative algebra, Addison-Wesley (1969) . ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

Visitor Information and Housing Request . Please note: APO accommodations are not available to the public . Read this page carefully, and please submit this form 30-working days in advance of your arrival. ... When on-site accommodations are full, APO will assist you in obtaining off-site housing. ... To cancel an existing reservation, enter the name and arrival date and choose "cancel." ... Complete the name and arrival date in the fill-in form and select Cancel . ... Room #1/Dorm A . ...

Next: The X-ray Optics Up: No Title Previous: No Title . ... NASA's newest Great Observatory, the Chandra X-Ray Observatory (CXO) - formally known as the Advanced X-Ray Astrophysics Facility (AXAF) - launched on July 23, 1999 and represents such an advance. ... CXO has broad scientific objectives and an outstanding capability to provide high-resolution ( 0.5-arcsec) imaging, spectrometric imaging and high resolution dispersive spectroscopy over the energy band from 0.1 to 10 keV. ...

... Telescopes . LX850 Series . ... Superb optical performance coupled with time proven computerized pointing and tracking has made the LX200 ACF series a best-seller in the high-performance telescope class. ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Acrobat 80 - Advanced Photo Tripod . ... Acrobat 80 - Advanced Photo Tripod #608051. ...

Welcome to Where's Waldo? , a new and excitingly interactive Web game based on the timeless children's classic. ... Hopefully some day a text-only version, la Find-the-Spam , will be made available. This game is for advanced players only. ... To accommodate the bandwidths of different users, two versions of the game are available: . Large Format (233 k) . Small Format (57 k) . Boy, you'd think the little guy would want to be rescued! ...