Arlington County has an extensive network of bicycle infrastructure, including 50 miles of shared-use off-street trails. These multi-use trails are generally 10 feet wide with a solid yellow line striped down the middle to separate users.
Constructive mathematics. Idea. Broadly speaking, constructive mathematics is mathematics done without the principle of excluded middle (or other principles, such as the full axiom of choice, that imply it).
A constructive obligation is an obligation that is implied by a set of circumstances in a particular situation, as opposed to a contractually based obligation. The accounting equation relates assets, liabilities, and owner's equity: The accounting equation is the mathematical structure of the balance sheet. Probably the most accepted accounting definition of liability is the one used by the International Accounting Standards Board (IASB).