Seppo Seikkala

1.8k total citations · 2 hit papers
20 papers, 1.4k citations indexed

About

Seppo Seikkala is a scholar working on Applied Mathematics, Numerical Analysis and Computational Theory and Mathematics. According to data from OpenAlex, Seppo Seikkala has authored 20 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Applied Mathematics, 8 papers in Numerical Analysis and 7 papers in Computational Theory and Mathematics. Recurrent topics in Seppo Seikkala's work include Nonlinear Differential Equations Analysis (11 papers), Differential Equations and Numerical Methods (8 papers) and Fixed Point Theorems Analysis (6 papers). Seppo Seikkala is often cited by papers focused on Nonlinear Differential Equations Analysis (11 papers), Differential Equations and Numerical Methods (8 papers) and Fixed Point Theorems Analysis (6 papers). Seppo Seikkala collaborates with scholars based in Finland, United States and United Kingdom. Seppo Seikkala's co-authors include Osmo Kaleva, Seppo Heikkilä, Jukka Saranen, G.S. Ladde and R. Kannan and has published in prestigious journals such as SHILAP Revista de lepidopterología, Fuzzy Sets and Systems and Journal of Mathematical Analysis and Applications.

In The Last Decade

Seppo Seikkala

19 papers receiving 1.1k citations

Hit Papers

On the fuzzy initial value problem 1984 2026 1998 2012 1987 1984 200 400 600
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. On the fuzzy initial value problem
    1987 644 citations Seppo Seikkala Fuzzy Sets and Systems profile →
  2. On fuzzy metric spaces
    1984 544 citations Osmo Kaleva, Seppo Seikkala Fuzzy Sets and Systems profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Seppo Seikkala Finland 8 892 504 488 464 315 20 1.4k
Osmo Kaleva Finland 11 2.1k 2.3× 597 1.2× 1.2k 2.4× 852 1.8× 658 2.1× 20 2.6k
Jin-xuan Fang China 18 189 0.2× 478 0.9× 425 0.9× 358 0.8× 167 0.5× 68 1.1k
Vasile Lupulescu Romania 18 819 0.9× 86 0.2× 953 2.0× 74 0.2× 725 2.3× 57 1.3k
Bipan Hazarika India 24 1.3k 1.4× 686 1.4× 993 2.0× 402 0.9× 445 1.4× 202 1.9k
Charles Castaing France 10 313 0.4× 356 0.7× 1.1k 2.2× 193 0.4× 263 0.8× 28 1.9k
Lakshmi Narayan Mishra India 17 373 0.4× 220 0.4× 467 1.0× 71 0.2× 220 0.7× 133 997
Hamzeh Agahi Iran 13 250 0.3× 93 0.2× 429 0.9× 235 0.5× 55 0.2× 73 648
A. Khastan Iran 18 915 1.0× 29 0.1× 592 1.2× 210 0.5× 439 1.4× 53 1.1k
Ngo Van Hoa Vietnam 18 856 1.0× 49 0.1× 793 1.6× 50 0.1× 749 2.4× 86 1.2k
J. Vasundhara Devi United States 18 375 0.4× 178 0.4× 1.6k 3.2× 45 0.1× 1.3k 4.2× 48 2.0k

Countries citing papers authored by Seppo Seikkala

Since Specialization
Citations

This map shows the geographic impact of Seppo Seikkala's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Seppo Seikkala with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Seppo Seikkala more than expected).

Fields of papers citing papers by Seppo Seikkala

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Seppo Seikkala. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Seppo Seikkala. The network helps show where Seppo Seikkala may publish in the future.

Co-authorship network of co-authors of Seppo Seikkala

This figure shows the co-authorship network connecting the top 25 collaborators of Seppo Seikkala. A scholar is included among the top collaborators of Seppo Seikkala based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Seppo Seikkala. Seppo Seikkala is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Seikkala, Seppo & Seppo Heikkilä. (2008). On non-absolute functional Volterra integral equations and impulsive differential equations in ordered Banach spaces. SHILAP Revista de lepidopterología. 2 indexed citations
2.
Heikkilä, Seppo, et al.. (2008). Convergence theorems for HL integrable vector-valued functions with applications. Nonlinear Analysis. 70(5). 1939–1955. 11 indexed citations
3.
Heikkilä, Seppo, et al.. (2007). On functional improper Volterra integral equations and impulsive differential equations in ordered Banach spaces. Journal of Mathematical Analysis and Applications. 341(1). 433–444. 8 indexed citations
4.
Heikkilä, Seppo & Seppo Seikkala. (2005). On singular, functional, nonsmooth and implicit phi-Laplacian initial and boundary value problems. Journal of Mathematical Analysis and Applications. 308(2). 513–531. 9 indexed citations
5.
Seikkala, Seppo, et al.. (2002). Towards the theory of fuzzy differential equations. Fuzzy Sets and Systems. 125(2). 231–237. 81 indexed citations
6.
Kannan, R. & Seppo Seikkala. (2001). Existence of Solutions to u″+u+g(t,u,u′)=p(t),u(0)=u(π)=0. Journal of Mathematical Analysis and Applications. 263(2). 555–564. 3 indexed citations
7.
Heikkilä, Seppo & Seppo Seikkala. (2001). Maximum principles and uniqueness results for phi-Laplacian boundary value problems. Journal of Inequalities and Applications. 2001(3). 681201–681201. 5 indexed citations
8.
Heikkilä, Seppo, et al.. (2000). Uniqueness and existence results for implicit impulsive differential equations. Nonlinear Analysis. 42(1). 13–26. 7 indexed citations
9.
Seikkala, Seppo & Seppo Heikkilä. (1997). Uniqueness, comparison and existence results for discontinuous implicit differential equations. Nonlinear Analysis. 30(3). 1771–1780. 7 indexed citations
10.
Heikkilä, Seppo, et al.. (1996). Existence, Uniqueness, and Comparison Results for a Differential Equation with Discontinuous Nonlinearities. Journal of Mathematical Analysis and Applications. 201(2). 478–488. 5 indexed citations
11.
Saranen, Jukka & Seppo Seikkala. (1989). Some remarks on nonlinear second-order differential equations with periodic boundary conditions. Journal of Mathematical Analysis and Applications. 139(2). 465–476. 1 indexed citations
12.
Saranen, Jukka & Seppo Seikkala. (1988). Solution of a nonlinear two-point boundary value problem with Neumann-type boundary data. Journal of Mathematical Analysis and Applications. 135(2). 691–701. 7 indexed citations
13.
Ladde, G.S. & Seppo Seikkala. (1987). On sample solutions of random initial value and Nicoletti boundary value problems. Mathematics and Computers in Simulation. 29(3-4). 223–231.
14.
Seikkala, Seppo. (1987). On the fuzzy initial value problem. Fuzzy Sets and Systems. 24(3). 319–330. 644 indexed citations breakdown →
15.
Ladde, G.S. & Seppo Seikkala. (1986). Existence, Uniqueness, and Upper Estimates for Solutions of Mcshane Type Stochastic Differential Systems. Stochastic Analysis and Applications. 4(4). 409–429. 4 indexed citations
16.
Kaleva, Osmo & Seppo Seikkala. (1984). On fuzzy metric spaces. Fuzzy Sets and Systems. 12(3). 215–229. 544 indexed citations breakdown →
17.
Seikkala, Seppo. (1982). On a classical Nicoletti boundary value problem. Monatshefte für Mathematik. 93(3). 225–238. 2 indexed citations
18.
Heikkilä, Seppo, et al.. (1981). Existence, uniqueness and comparison results for nonlinear boundary value problems involving a deviating argument. Journal of Differential Equations. 41(3). 320–333. 3 indexed citations
19.
Heikkilä, Seppo & Seppo Seikkala. (1977). On fixed points through cluster values of iterates. Nonlinear Analysis. 1(6). 603–606. 2 indexed citations
20.
Heikkilä, Seppo & Seppo Seikkala. (1977). On the estimation of successive approximations in abstract spaces. Journal of Mathematical Analysis and Applications. 58(2). 378–383. 8 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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