Results 41 to 50 of about 14,100 (298)
An Illuminating Counterexample
The American Mathematical Monthly, 2003 We give a visually appealing counterexample to the proposition that unbiased estimators are better than biased estimators.
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Discrete Mathematics, 1997 A conjecture concerning perfect graphs asserts that if for a Berge graph \(G\) (i.e., a graph without odd holes and odd antiholes) the following three conditions hold: (1) neither \(G\), nor \(\overline {G}\) has an even pair; (2) neither \(G\), nor \(\overline {G}\) has a stable cutset; (3) neither \(G\), nor \(\overline {G}\) has a star-cutset, then \
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Counterexamples to Mercat’s conjecture [PDF]
Archiv der Mathematik, 2016 6 pages, Proof of a lemma added in Section 2, Slight change in the proof of the main theorem, added ...
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Counterexamples in scale calculus [PDF]
Proceedings of the National Academy of Sciences, 2019 Significance The counterexamples presented here are the first of this kind for notions of differentiability that satisfy a chain rule. Their context arises naturally from requiring differentiability of crucial maps in the theory of pseudoholomorphic curves in symplectic geometry.
Filippenko, Benjamin +2 more
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Counterexample-guided abstraction refinement
, 2000 We present an automatic iterative abstraction-refinement methodology in which the initial abstract model is generated by an automatic analysis of the control structures in the program to be verified. Abstract models may admit erroneous (or "spurious&
Orna Grumberg (5415962) +14 more
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Advanced Robotics Research, EarlyView.DRIVE‐SAFE evaluates learning‐based, black‐box autonomous driving policies against evolving temporal safety requirements using Signal Temporal Logic robustness metrics. It aggregates distributional robustness measures with domain‐informed weights to guide iterative retraining.
Kristy Sakano +3 more
wiley +1 more source
Kaplan’s Counterexample to Quine’s Theorem
, 2018 In his article “Opacity” (1986), David Kaplan propounded a counterexample to the thesis, defended by Quine and known as Quine’s Theorem, that establishes the illegitimacy of quantifying from outside into a position not open to substitution.
Paolo Bonardi
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A counterexample to analyticity in frictional dynamics
, 2022 We consider the motion of a particle acted on by dry friction and a force that is an analytic function of time. We give a counterexample to the claim that such motions are given by analytic functions of time.
Christopher R. Dance
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On the Prospects for African Philosophy in Australia
Australian Journal of Social Issues, EarlyView.ABSTRACT This paper grapples with the situation of people of African descent in Australia by working through the constitution of the body of academic philosophy in the country. It contends with the parochialism of the Australian philosophical community and the prospects for the cultivation of greater pluralism. Taking African philosophy as one possible
Bryan Mukandi
wiley +1 more source
A counterexample to the Nelson-Seiberg theorem
Journal of High Energy Physics, 2020 We present a counterexample to the Nelson-Seiberg theorem and its extensions. The model has 4 chiral fields, including one R-charge 2 field and no R-charge 0 filed.
Zheng Sun, Zipeng Tan, Lu Yang
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