DIRECTIONAL LOWER POROSITY

被引：0
|
作者：
Speight, Gareth [1 ]
机构：
[1] Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy
来源：
REAL ANALYSIS EXCHANGE | 2013年 / 39卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
Lower Porosity; Directed Porosity; Directionally Porous; Sigma Porous;
D O I：
暂无
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
We investigate differences between upper and lower porosity, In finite dimensional Banach spaces every upper porous set is directionally upper porous. We show the situation is very different for lower porous sets; there exists a lower porous set in R-2 which is not even a countable union of directionally lower porous sets.
引用
收藏
页码：45 / 55
页数：11
相关论文
共 50 条
  • [41] SILICA CEMENT SOURCE AND POROSITY PRESERVATION FOR OHIOS LOWER SILURIAN SANDSTONES
    SMIRALDO, M
    BURFORD, AE
    AAPG BULLETIN-AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS, 1984, 68 (12): : 1928 - 1928
  • [42] Effects of Peclet number on pore-scale mixing and channeling of a tracer and on directional advective porosity
    Tartakovsky, Alexandre M.
    Neuman, Shlomo P.
    GEOPHYSICAL RESEARCH LETTERS, 2008, 35 (21)
  • [43] Buckling of porosity-dependent bi-directional FG nanotube using numerical method
    Wang, Haiquan
    Zandi, Yousef
    Gholizadeh, Morteza
    Issakhov, Alibek
    ADVANCES IN NANO RESEARCH, 2021, 10 (05) : 493 - 507
  • [44] Dynamic Evolution of Porosity in Lower-Crustal Faults During the Earthquake Cycle
    Michalchuk, Stephen Paul
    Zertani, Sascha
    Renard, Francois
    Fusseis, Florian
    Chogani, Alireza
    Plumper, Oliver
    Menegon, Luca
    JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2023, 128 (08)
  • [45] Anomalous porosity preservation in the Lower Cretaceous Nahr Umr sandstone, Southern Iraq
    Mohammed, Abbas K. A.
    RUSSIAN JOURNAL OF EARTH SCIENCES, 2021, 21 (02):
  • [46] STYLOLITES AND POROSITY IN A LOWER CRETACEOUS LIMESTONE RESERVOIR, ONSHORE ABU DHABI, UAE
    Ehrenberg, Stephen N.
    Morad, Sadoon
    Liu Yaxin
    Chen, Rulin
    JOURNAL OF SEDIMENTARY RESEARCH, 2016, 86 (10) : 1228 - 1247
  • [47] POROSITY TRENDS OF THE LOWER CRETACEOUS J-SANDSTONE, DENVER BASIN, COLORADO
    SCHMOKER, JW
    HIGLEY, DK
    JOURNAL OF SEDIMENTARY PETROLOGY, 1991, 61 (06): : 909 - 920
  • [48] EVOLUTION OF POROSITY AND PERMEABILITY IN THE LOWER CRETACEOUS TRAVIS PEAK FORMATION, EAST TEXAS
    DUTTON, SP
    DIGGS, TN
    AAPG BULLETIN, 1992, 76 (02) : 252 - 269
  • [49] Organic porosity evaluation of Lower Cambrian Niutitang Shale in Qiannan Depression, China
    Chen, Fangwen
    Ding, Xue
    Lu, Shuangfang
    PETROLEUM SCIENCE AND TECHNOLOGY, 2016, 34 (11-12) : 1083 - 1090
  • [50] BIOFACIES AND DEVELOPMENT AND DIFFERENTIAL OCCLUSION OF POROSITY IN A LOWER CRETACEOUS (EDWARDS) REEF - DISCUSSION
    WRIGHT, VP
    WATTS, NL
    JOURNAL OF SEDIMENTARY PETROLOGY, 1978, 48 (04): : 1360 - 1361
12345