nonsingular C2+

/ˌnɑnˈsɪŋɡjələr/ of a matrix, having an inverse; invertible

singularize C2+

/ˈsɪŋɡjələraɪz/ to make singular or distinguish as unique

singularly C2+

/ˈsɪŋɡjələrli/ in a remarkable or exceptional manner; uniquely