Existence of incompressible minimal surfaces and the topology of three - dimensional manifolds with

A multi-purpose handle-directed, manually propelled wheeled vehicle particularly well adapted for safe snow removal, load carrying, and similar labor saving tasks in rough and uncertain terrain; in preferred embodiment a frame having open lenticular shape in plan view houses a wheel centrally between a "T" handle at the rear end and a load lug at the front end to which snow blade, heavy broomrake and other implements attach; at each end also on the upper surface a load pickup station is provided which supports a detachable bed or carrying body with drop-end and downwardly projecting legs providing, with the wheel, braked, non-tipping 3-point support when at rest.