# On upper and lower ( τ1,τ2 )-precontinuous multifunctions

@inproceedings{Boonpok2018OnUA, title={On upper and lower ( $\tau$1,$\tau$2 )-precontinuous multifunctions}, author={Chawalit Boonpok and Chokchai Viriyapong and Montri Thongmoon}, year={2018} }

This paper deals with the concepts of upper and lower (τ1, τ2)-precontinuous multifunctions. Some characterizations of upper and lower (τ1, τ2)-precontinuous multifunctions are investigated. The relationships between upper and lower (τ1, τ2)precontinuous multifunctions and the other types of continuity are discussed.

#### 5 Citations

(τ1,τ2)α-Continuity for Multifunctions

- Mathematics
- 2020

The main goal of this article is to introduce the concepts of upper and lower (τ1, τ2)α-continuous multifunctions. Characterizations of upper and lower (τ1, τ2)α-continuous multifunctions are… Expand

(τ1,τ2)δ-semicontinuous multifunctions

- Mathematics, Medicine
- Heliyon
- 2020

The purpose of the present article is to introduce the concepts of upper and lower (τ1,τ2)δ-semicontinuous multifunctions and the other types of continuity for multifunctions. Expand

On almost (τ1,τ2)-semicontinuous multifunction via ideals

- 2019

The aim of this paper is to introduce and study upper and lower almost (τ1,τ2)-semi-I -continuous multifunctions as a generalization of upper and lower (τ1,τ2)-semi-I -continuous multifunctions,… Expand

Generalized τ 1 τ 2-Closed Sets in Ideal Bitopological Spaces

- 2018

This paper deals with the concept of I -g-τ1τ2-closed sets in ideal bitopological spaces. I -g-τ1τ2-normal and I -g-τ1τ2-regular spaces are introduced and various characterizations are given. Several… Expand

Multifunction between bitopologcal spaces via ideals

- 2020

In this paper, we introduce and study some properties of pairwise upper (lower) semi-I -continuous multifunctions.

#### References

SHOWING 1-10 OF 15 REFERENCES

ON WEAKLY PRECONTINUOUS FUNCTIONS IN BITOPOLOGICAL SPACES

- Mathematics
- 2007

As a generalization of precontinuous functions, we introduce the no- tion of weakly precontinuous functions in bitopological spaces and obtain several characterizations and some properties of weakly… Expand

ON UPPER AND LOWER CONTRA-!-CONTINUOUS MULTIFUNCTIONS

- 2014

In this paper, we dene contra- !-continuous multifunctions between topological spaces and obtain some characterizations and some basic properties of such multifunctions.

Semi-Open Sets and Semi-Continuity in Topological Spaces

- Mathematics
- 1963

(1963). Semi-Open Sets and Semi-Continuity in Topological Spaces. The American Mathematical Monthly: Vol. 70, No. 1, pp. 36-41.

On Semi*-Open Sets

- Computer Science
- SOCO 2012
- 2012

The semi*-border, semi-frontier and semi-exterior of a subset of a topological space are defined and some of their properties are studied. Expand

Almost Open

- Science Signaling
- 2013

Crystal structure analysis reveals that βγ subunits twist the GIRK2 K+ channel into a conformation closer to open. GIRK channels are G protein–activated K+ channels that are important for limiting… Expand

Precontinuity and semi-precontinuity in bitopological spaces

- Indian J. Pure Appl. Math., 23
- 1992

On pairwise almost strongly θ-continuous mappings

- Bull. Calcutta Math. Soc., 79
- 1987

Subsets and paracompactness

- Univ. u Novom Sadu Zb. Rad. Prirod.-Mat. Fak. Ser. Mat., 14
- 1984