• Probability.

• Stochastic process.

• Lévy process.

• Penalization problem.

• Conditioning problem.

---------------Preprints--------------------

1. [arXiv: 2608.26642] K.Iba. Fredholm and Sturm--Liouville Type Characterizations of the Limit Measure for the Kac Killing Penalization for Lévy Processes. (New!)

2. [arXiv: 2607.28728] K. Iba and G. Tokumitsu. Elephant Random Walk Conditioned to Avoid Zero. (New!)

3. [arXiv: 2606.17472] K.Iba and V. Rivero. A Tanaka-Type Formula for Compact Sets and Equilibrium Measures of Lévy Processes. (New!)

4. [arXiv: 2507.00457] K. Iba. Multi-point local time penalizations with various clocks for one-dimensional Lévy processes.

5. [arXiv: 2501.02776] K. Iba. Conditioning to avoid bounded sets for a one-dimensional Lévy processes.

---------------Preprints--------------------

---------------Papers (refereed)--------------------

1. [arXiv: 2602.09342] K. Iba.  Hitting Probabilities of Finite Points for One-Dimensional Lévy Processes.
   Statistics & Probability Letters. 241, 2027.

2. [arXiv: 2404.06759] K. Iba and K. Yano. Two-point local time penalizations with various clocks for Lévy processes.
   ALEA, Lat. Am. J. Probab. Math. Stat. 22, 183--207, 2025.

---------------Papers (refereed)--------------------

---------------Papers (non-refereed)--------------------

1. 伊庭滉基. レヴィ過程に対する処罰問題と条件付問題.
   第22回数学総合若手研究集会 : 数学の交叉点, Hokkaido University technical report series in Mathematics, 191, 433--438, 2026. 

2. 伊庭滉基. Lévy過程に対する有限点局所時間処罰問題.
   無限分解可能過程に関連する諸問題(30), 統計数理研究所共同研究リポート487, 79--81, 2026. 

3. K. Iba and K. Yano. Conditionings to avoid points with various clocks for Lévy processes.
   無限分解可能過程に関連する諸問題(29), 統計数理研究所共同研究リポート479, 9--26, 2025. 

4. K. Iba and K. Yano. Penalization by two point local times with various clocks.  
   無限分解可能過程に関連する諸問題(28),  統計数理研究所共同研究リポート472,  89--93,  2024.

---------------Papers (non-refereed)--------------------

Only talks given at international conferences are listed. 

-----------------2026----------------------

1. [Invited] Kohki Iba. A Tanaka-type formula for compact sets and equilibrium measures of Lévy processes.
   Probability Workshop at Kansai University. 2026/08/28. (at Kansai univ.).

2. [Invited] [Slide] Kohki Iba. Hitting Probabilities of Finite Points for One-Dimensional Lévy Processes.
   Life Insurance Mathematics, Stochastic Processes, and related topics 2026. 2026/06/10. (at Osaka univ.). 

3. [Invited] Kohki Iba. Hitting Probabilities of Finite Points for One-Dimensional Lévy Processes.
   Non-commutative Probability, Random Matrices and Lévy processes 2026. 2026/03/16. (at Osaka univ.).

[ 8 other talks at conferences in Japan. ]

-----------------2026----------------------

-----------------2025----------------------

1. [Poster]  Kohki Iba, Penalization and Conditioning for Lévy Processes.
   Symposium of Probability and Stochastic Processes  XV.  2025/11/13. (at Universidad de Sonora).

2. [Poster]  Kohki Iba, Penalization and Conditioning for Lévy Processes.
   French-Japanese Conference  on Probability and Interactions. 2025/09/03. (at Waseda univ.).

3. [Invited] Kohki Iba, Conditioning to avoid bounded sets for a one-dimensional Lévy processes.
   Non-commutative probability, random matrices and Lévy processes 2024. 2025/03/26. (at ISM).

4. [Invited] Kohki Iba, Conditioning to avoid bounded sets for a one-dimensional Lévy processes.
   19th Mexico-Japan Probability Seminar. 2025/02/11. (at CIMAT, Mexico).

[ 9 other talks at conferences in Japan. ]

-----------------2025----------------------

-----------------2024----------------------

[ 7 other talks at conferences in Japan. ]

-----------------2024-----------------------

-----------------2023----------------------

1. [Poster] Kohki Iba and Kouji Yano, Penalization by two point local times with various clocks.
   XIV Simposio de Probabilidad y Procesos Estocasticos. 2023/11/23. (at CIMAT, Mexico).

[ 3 other talks at conferences in Japan. ]

-----------------2023----------------------

• Doctor (Science). Department of Mathematics, Graduate School of Science, Osaka University. (2024/04/01-).

• Master (Science). Department of Mathematics and Mathematical Analysis, Graduate School of Science, Kyoto University. (2022/04/01-2024/03/31).

• Bachelor (Science). Department of Mathematics, School of Education, Waseda University. (2018/04/01-2022/03/31).

---------------Present continuous (tense) --------------------

•  What is ...? seminar organizer. (2025/04-).

• TA, Osaka univ. (2024/04-).

• JSPS Research Fellowships for Young Scientists (DC2) (2026/04-).

---------------Present continuous (tense) --------------------

---------------Past experience --------------------

• JST SPRING Project student. (2024/04-2026/03).

• TA, Kyoto univ. (2022/04-2024/01 ).

---------------Past experience --------------------