Campoamor Stursberg, Otto-Rudwig2023-06-202023-06-2020080020-774810.1007/s10773-007-9482-3https://hdl.handle.net/20.500.14352/50620After classifying indecomposable quasi-classical Lie algebras in low dimension, and showing the existence of non-reductive stable quasi-classical Lie algebras, we focus on the problem of obtaining sufficient conditions for a quasi-classical Lie algebras to be the contraction of another quasi-classical algebra. It is illustrated how this allows to recover the Yang-Mills equations of a contraction by a limiting process, and how the contractions of an algebra may generate a parameterized families of Lagrangians for pairwise non-isomorphic Lie algebras.engjournal articlehttps//doi.org/10.1007/s10773-007-9482-3http://link.springer.com/article/10.1007%2Fs10773-007-9482-3open access512.554.3ContractionsQuasi-classical Lie algebrasÁlgebra1201 Álgebra