There are various names for the # sign, commonly known as the number sign - similar to the musical sharp sign - one of the most common in technical senses in telephony and computing is the octothorpe.
a fligolo
obelus
An equation
Plus, minus, division sign, multiplication sign, and equal sign... +,-, /, x, =
a prime square
a fligolo
obelus
The "-" can be a mathematical "minus" sign or a "hyphen" if used as part of text.
An equation
Plus, minus, division sign, multiplication sign, and equal sign... +,-, /, x, =
Prime factors
The scientific name for the number sign "#" is octothorpe.
It's simply called the "greater than" symbol.
A mathematical statement that contains an equal sign is called an equation.
A mathematical sentence that contains an equal sign is called an equation
Mathematical logic.
a prime square