Research Output per year

## Fingerprint Dive into the research topics where Toshimichi Usuba is active. These topic labels come from the works of this person. Together they form a unique fingerprint.

Large Cardinals
Mathematics

Stationary Set
Mathematics

Subset
Mathematics

Reflection Principle
Mathematics

Weak Compactness
Mathematics

Partition
Mathematics

Compact Hausdorff Space
Mathematics

Uncountable
Mathematics

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Network
Recent external collaboration on country level. Dive into details by clicking on the dots.

## Research Output 2007 2019

- 40 Citations
- 4 h-Index
- 24 Article

## A note on the tightness of G_{δ}-modifications

Usuba, T., 2019 Sep 15, In : Topology and its Applications. 265, 106820.Research output: Contribution to journal › Article

Tightness

Strongly Compact Cardinal

Continuum

Arbitrary

##
G
_{δ}
-topology and compact cardinals

Usuba, T., 2019 Jan 1, In : Fundamenta Mathematicae. 246, 1, p. 71-87 17 p.Research output: Contribution to journal › Article

Compact Hausdorff Space

Supremum

Strongly Compact Cardinal

Measurable Cardinal

Topology

## Products of Lindelöf spaces with points G_{δ}

Usuba, T., 2019 Feb 1, In : Topology and its Applications. 252, p. 90-96 7 p.Research output: Contribution to journal › Article

Strictly

## Extendible cardinals and the mantle

Usuba, T., 2018 Apr 18, (Accepted/In press) In : Archive for Mathematical Logic. p. 1-5 5 p.Research output: Contribution to journal › Article

Intersection

Model

## New combinatorial principle on singular cardinals and normal ideals

Usuba, T., 2018 Jan 1, (Accepted/In press) In : Mathematical Logic Quarterly.Research output: Contribution to journal › Article

Saturation

Intersection