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This article extends the celebrated sewing lemma to multi-parameter fields on hyper cubes. We use this to construct Young integrals for multi-parameter Holder fields on general domains [0,1]^{k} with k>=1. Moreover, we show existence, uniqueness and stability of some particular types of hyperbolic SPDE's driven by space-time Holder noise in a Young regime This article replaces the article "Rough Integration for Fields - with applications to stochastic hyperbolic PDE's". Due to errors in the first article in the section on rough fields, we have decided to divide this article into two parts. The first, is dealing with extending the sewing lemma to general multi parameter functions as well as hyperbolc equations driven by multiparameter fields in a Young regime. The next article will come later and study the rough path type framework implied by the extended sewing lemma.

An extension of the sewing lemma to hyper-cubes and hyperbolic equations driven by multi-parameter Young fields