| RIEMANN | German mathematician Bernhard with a namesake hypothesis about zeros of the zeta function |
| ETS | Supposed figures in the Zeta Reticuli incident, for short |
| RADICAL | The base form of a word, a political extremist, a reactive chemical species, sign or zero of a function, all linked by the concept of "root" (7) |
| MOSTEL | Zero of "The Hot Rock" |
| NOONE | Zero of the population |
| BIGBANGLETHEORY | Hypothesis about the origin of bracelets? |
| PETTHEORY | Favourite hypothesis about a man and his dog? (3,6) |
| MOBIUSSTRIPS | In mathematics, loops with a one-sided surface, named after a German mathematician (6,6) |
| STEADYSTATETHEORY | Obsolete hypothesis about the universe's origin |
| GAUSS | Karl, German mathematician after whom the cgs unit of magnetic flux density is named (5) |
| MINKOWSKI | Russian-born German mathematician who suggested the concept of four-dimensional space-time (9) |
| FROZEN | The first frost, about zero before the end of autumn, will make it icy (6) |
| READER | The -; English title of a novel by Bernhard Schlink, adapted into a film with Kate Winslet by David Hare (6) |
| SETTHEORY | Hypothesis about domestic animals or hobbyhorse (3,6) |
| BIGBANKTHEORY | Hypothesis about major financial institutions? |
| KLEIN | German mathematician with no capacity for the bottle? |
| LEIBNIZ | German mathematician has written up note that is carried by the Queen to her friends? (7) |
| VOXPOPULI | Very neat pupil's upset about zero for interview with the public (3,6) |
| MOBIUS | German mathematician's way of working I captured in computer circuit |
| RESET | Restored to zero (of gauge, eg.) |
