Sep 2026· Zenodo (CERN European Organization for Nuclear Research)
Topological Materials and Phenomena
Abstract
This article challenges the traditional categorization of second-order linear recurrence relations, such as theFibonacci sequence, as purely discrete mathematical constructs relegated to Number Theory. By extending thesesystems to the continuous time domain, a hidden Complex Wave Mechanics is revealed, where solutions do notbehave as standard vectors, but as spinors. These spinors exhibit a 4 periodicity and an intrinsic phase sensitivitythat breaks time-reversal symmetry, splitting the dynamics into two conjugate, asymmetric modes: a co-rotatingand a counter-rotating wave function. This work establishes the formal mathematical scaffolding of this continuousextension and demonstrates that the resulting topology is isomorphic to well-established physical phenomena,ranging from the macroscopic precession of the Foucault Pendulum and optical chirality in the Sagnac effect tothe protected edge modes of Topological Superconductors. Building on these isomorphisms, we bridge thistheoretical framework to cutting-edge quantum technologies through the concept of "Fibonacci Moiré Printing".We demonstrate how 2D periodic networks in rotated substrates can geometrically induce robust quasicrystallinetopology, bypassing the fragility of fine-tuned "magic angles" in twistronics. Furthermore, parity inversion isintroduced as a non-Hermitian control mechanism that purges disorder and thermal noise via the Skin Effect,effectively protecting the quantum coherence of Majorana Bound States and correlated moiré phases essential foradvanced computing.
This publication proposes a definition and a classification of agile software development approaches and analyses ten software development methods that can be characterized as being "agile" against the defined criterion.
P. Abrahamsson, O. Salo, Jussi Ronkainen et al.· arXiv.org· 727 citations· ⚡54
The study shows that agile practices improve both informal and formal communication, but indicates that, in larger development situations involving multiple external stakeholders, a mismatch of adequate communication mechanisms can sometimes even hinder the communication.
M. Pikkarainen, Jukka Haikara, O. Salo et al.· Empirical Software Engineeri...· 401 citations· ⚡48
The results indicate that software engineering work practices are chosen opportunistically, adapted and configured to provide value under the constrains imposed by the startup context.
Nicolò Paternoster, Carmine Giardino, M. Unterkalmsteiner et al.· Information and Software Tec...· 394 citations· ⚡54
The perception of the impact of agile methods is predominantly positive, and several challenge areas were discovered, but based on this study, agile methods are here to stay.
M. Laanti, O. Salo, P. Abrahamsson· Information and Software Tec...· 260 citations· ⚡20
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