In 3D Euclidean space R³, we prove that the necessary and sufficient condition for the spherical-shell mass growth rate dm/dr of a spherically symmetr

The condition being paid is not size and not smoothness but being an integer.

When told that nothing has been assumed, look for the assumption that was not written down.

A notation moves no theorem, and it does move which mistake looks natural.

One word, six integrals – and Lebesgue does not contain improper Riemann.

A split into three is not a statement of topology – the plane and the disk are homeomorphic.

The single phrase equivalence principle names three claims that differ in what they assume and in how they are tested.

Probability has four addresses – sharing the axioms does not mean sharing the answers.

A good code exists and here is a good code are different sentences – some sixty years lay between them.

There are states about which the whole is completely known and the parts are not known at all.