Abstract: Jacobi sets are an important tool to study the relationship between functions. Defined as the set of all points where the function’s gradients are linearly dependent, Jacobi sets extend the ...

Get our free politics and culture newsletter delivered to your inbox every other Thursday. Sign up In December, on a two-lane road not far from the ACE Basin, a protected ecosystem and wildlife refuge ...

WASHINGTON, Jan 5 (Reuters) - U.S. manufacturing activity slumped to a 14-month low in December, with new orders contracting further and input costs grinding higher as the sector continued to bear the ...