منابع مشابه
Logarithmically small minors and topological minors
For every integer t there is a smallest real number c(t) such that any graph with average degree at least c(t) must contain a Kt-minor (proved by Mader). Improving on results of Shapira and Sudakov, we prove the conjecture of Fiorini, Joret, Theis and Wood that any graph with n vertices and average degree at least c(t) + ε must contain a Kt-minor consisting of at most C(ε, t) logn vertices. Mad...
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BACKGROUND Recent years have seen new challenges to laws protecting minors' confidential access to reproductive health services. Little research has explored parental views on the issue. OBJECTIVE To examine parents' views about laws requiring parental notification (PNLs) when minor children seek to obtain prescription contraceptives, the exceptions parents would endorse, and the consequences...
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OBJECTIVE To evaluate the cost-effectiveness of ulipristal acetate and levonorgestrel in minors in France, and analyze whether it is worthwhile to provide ulipristal acetate to minors free of charge. METHODS The cost-effectiveness of two emergency contraceptive methods was compared based on a decision-analytical model. Pregnancy rates, outcomes of unintended pregnancies, and resource utilizat...
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CONTEXT Recent legislative efforts to implement mandated parental involvement for minor adolescents seeking family planning services threaten the rights of adolescents younger than 18 to access reproductive health care. METHODS State and federal laws and policies pertaining to minor adolescents' rights to access services for contraception and sexually transmitted diseases are reviewed, and re...
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We prove that, for each positive integer k, every sufficiently large 3-connected regular matroid has a parallel minor isomorphic to M∗(K3,k), M(Wk), M(Kk), the cycle matroid of the graph obtained from K2,k by adding paths through the vertices of each vertex class, or the cycle matroid of the graph obtained from K3,k by adding a complete graph on the vertex class with three vertices.
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ژورنال
عنوان ژورنال: BMJ
سال: 1974
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.2.5918.563-d