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arXiv · 2608.14248

Lyra Almost Ricci-Bourguignon Solitons on Twisted Warped Product Manifolds

Ayman Elsharkawy·Eman Ghareeb Rezk·Uday Chand De·Emad F. Wanas·Abdelrahman M. Tawfiq
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Abstract

This paper defines Lyra almost Ricci-Bourguignon solitons on twisted warped product manifolds and investigates the interaction between the twisting function, the Lyra scale, and the soliton potential field. We derive the horizontal, vertical, and mixed components of the soliton equation and obtain trace, gradient, and factor-inheritance characterizations. The mixed equation yields new rigidity phenomena: a base-dependent Lyra scale preserves the ordinary separability obstruction, whereas a fiber-dependent scale admits a weighted compensation law that allows genuinely nonseparable twisting functions. We also establish Einstein reductions for conformal, Killing, homothetic, concurrent, and gradient potential fields. Exact flat and non-flat examples, together with local and compact nonexistence results, demonstrate the geometric significance of the scale?twisting interaction.

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Ayman Elsharkawy, Eman Ghareeb Rezk, Uday Chand De, Emad F. Wanas, Abdelrahman M. Tawfiq. 2026-08-14. Lyra Almost Ricci-Bourguignon Solitons on Twisted Warped Product Manifolds. https://arxiv.org/abs/2608.14248

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