The most basic relations in set theory can be summarized as follows. 1  A set S1 is a subset of set S if and only if every element of S1 is also an element of S. 2  A set S1 is a proper subset of set S if and only if every element of S1 is also an element of S, but there are some elements in S that are not elements of S1.
Then you NEED to feed the puppies yourself. NOT water either, you need puppy replacement milk. Newborn puppies do not drink water. Newborn puppies do nothing but suckle till they ar 4-5 weeks. My dogs pups are 4 weeks old and they are JUST starting to be interested in water and puppy milk soaked kibble. Go get puppy replacement milk from a pet store, petco and petsmart will have it.
It seems obvious, but some puppies won't drink water that has been sitting in the bowl for a few hours. Dogs are easily put off drinking if the water is too warm. This is more likely to happen in warm weather and if the water bowl is left outside. The water is also more likely to get dirty pretty quickly if the bowl is outdoors. Clean and cool water is more likely to entice your puppy. Exercise your puppy with a long walk. When he returns he is more likely to feel the need for a drink.