Some new estimates of the ‘Jensen gap’
Some new estimates of the ‘Jensen gap’
复制标题
对“詹森差距”的一些新估计
DOI:
10.1186/s13660-016-0985-4
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发表时间:
2016
影响因子:
1.6
通讯作者:
L. Persson
中科院分区:
文献类型:
--
作者:
S. Abramovich;L. Persson
Let (μ,Ω)$( \mu,\Omega ) $ be a probability measure space. We consider the so-called ‘Jensen gap’ J(φ,μ,f)=∫Ωφ(f(s))dμ(s)−φ(∫Ωf(s)dμ(s))$$ J ( \varphi,\mu,f ) = \int_{\Omega}\varphi \bigl( f ( s ) \bigr)\,d\mu ( s ) -\varphi \biggl( \int_{\Omega }f ( s )\,d\mu ( s ) \biggr) $$ for some classes of functions φ. Several new estimates and equalities are derived and compared with other results of this type. Especially the case when φ has a Taylor expansion is treated and the corresponding discrete results are pointed out.