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      Latest: Campbell Biology 9th vs 10th edition. NewtonsFellow, May 4, 2015 at 8:29 AM
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      Latest: Penn Foster Engineering Technician Degree? CalcNerd, May 4, 2015 at 11:00 AM
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      Latest: PF Insights: Topic Request Greg Bernhardt, May 4, 2015 at 10:09 AM
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      Latest: Is this credible: can the future affect the past atyy, May 4, 2015 at 10:50 AM
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      Latest: Gravitational Frequency Shift PeterDonis, May 4, 2015 at 10:42 AM
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      Latest: LHC Part 2: Commissioning - comments mfb, May 4, 2015 at 10:12 AM
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      Latest: Inflation and the false vacuum friend, May 4, 2015 at 10:50 AM
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    1. General Math

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      Latest: Lowest Common Multiple - LCM Mark44, May 4, 2015 at 9:04 AM
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      Latest: Ricci tensor equals zero implies flat splace? bcrowell, May 3, 2015 at 10:36 PM
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      Latest: Concurrence in Mathematica Quantioner, May 3, 2015 at 8:28 PM
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      Latest: Overlapping geometry in ANSYS fluent jlefevre76, May 4, 2015 at 10:59 AM
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      Latest: Problems with the Dreamliner battery rollingstein, May 4, 2015 at 10:59 AM
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      Latest: Plasma instabilities in fusion reactors amchugh89, May 1, 2015 at 11:57 PM
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    1. General Discussion

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      Latest: Random Thoughts part 4 Enigman, May 4, 2015 at 9:52 AM
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      Latest: Hey, I'm Zambadeos zambadeos, May 4, 2015 at 10:59 AM