निश्चर

पुं० [सं०] एकादश मन्वंतर के सप्तर्षियों में से एक। पुं०=निशाचर।(यह शब्द केवल स्थानिक रूप में प्रयुक्त हुआ है

It is an invariant of a knot which is defined as the minimal number of bridges required in all the possible bridge representations of a knot.

It is an invariant of a knot which is defined as the minimal number of bridges required in all the possible bridge representations of a knot.