Natural SciencesMathematicsCritical TheoryDifferential EquationsDynamical SystemsBifurcation TheoryCritical Point AnalysisLagrange PointsSingularity AnalysisCritical Point ClassificationCritical PointsDeformationDegenerate Critical PointsNondegenerate Critical PointsNormal FormsSingularitiesSingularity Classification
Our results suggested that serum OPG measurement, perhaps because of the complexity of the regulation of the OPG, may be difficult to utilize in the evaluation of anti-resorptive therapy. Moreover, low dose corticosteroid-associated osteoporosis is probably not mediated by inhibition of OPG.
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Lars Hörmander · Acta Mathematica · 1971 · 2.4K citations · Full text
On the solutions of analytic equations
Michael Artin · Inventiones mathematicae · 1968 · 475 citations