An extension of fractal Euler number via persistent homology
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866911722508386304 |
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| author | Nishijima, Kosuke |
| author_facet | Nishijima, Kosuke |
| contents | In the context of geometric measure theory, Llorente-Winter introduced the (average) fractal Euler number as a notion of the Euler characteristic for fractals embedded in Euclidean space. However, the class of fractals to which it is applicable remains very limited. In the present paper, we modify this notion by applying perspectives of persistent homology and partly the theory of magnitude, which have recently come from applied topology and category theory. We then demonstrate concrete calculation of our average ph-fractal Euler number for some classically well-known fractals, especially the Cantor dust and Menger sponge which are excluded from Llorente-Winter's approach. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_22049 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | An extension of fractal Euler number via persistent homology Nishijima, Kosuke Algebraic Topology Combinatorics Metric Geometry 55N31, 28A80 In the context of geometric measure theory, Llorente-Winter introduced the (average) fractal Euler number as a notion of the Euler characteristic for fractals embedded in Euclidean space. However, the class of fractals to which it is applicable remains very limited. In the present paper, we modify this notion by applying perspectives of persistent homology and partly the theory of magnitude, which have recently come from applied topology and category theory. We then demonstrate concrete calculation of our average ph-fractal Euler number for some classically well-known fractals, especially the Cantor dust and Menger sponge which are excluded from Llorente-Winter's approach. |
| title | An extension of fractal Euler number via persistent homology |
| topic | Algebraic Topology Combinatorics Metric Geometry 55N31, 28A80 |
| url | https://arxiv.org/abs/2605.22049 |