I've never heard of monotonic being used for two (input) variables, but I suppose it would mean that, for each fixed value of y, u is a monotonic function of x, and for each fixed value of x, u is a monotonic function of y (and I expect they'd need to be either both monotonic increasing or both monotonic decreasing).
Business Trust Law & Legal Definition. Business trust is a form of business organization which is similar to a corporation, in which investors receive transferable certificates of beneficial interest.n some states, a business trust is subject to the laws of trusts whereas in other states the laws of corporations or partnerships govern its existence.
A business partner is a commercial entity with which another commercial entity has some form of alliance. This relationship may be a contractual, exclusive bond in which both entities commit not to ally with third parties.or example in management style, mindset, and also technology. If, for example, management style would be too different between the firms then a partnership could be problematic. Kask and Linton (2013) investigate under what conditions business mating (formation) takes place for startup firms seeking business partners.