This formula allows the Mathematician to adjust the internal kinetic energy of nonliving objects, thus adjusting its temperature. The user of this formula can modify the temperature of up to five pounds of material per level of experience. The degree of change also increases as the Mathematician advances in level.
| Level | Temperature Change | Net Effect |
| 1-5 | Double or Halved | armour can be made uncomfortable. (-1AC, -2 all other actions.) |
| 6-9 | Third or Tripled | Weapons can be made too hot to touch. armour causes burns or frostbite (-3AC, 1d8 damage per round.) Lead melts. |
| 10-13 | Fourth or Quadrupled | Same as above, but touching heated objects causes 2d6 damage. Leather and clothing are ruined. Wood dries and becomes brittle (structural integrity decreases to 6 points per StP.) |
| 14-17 | Fifth or Quintupled | Touching heated objects cause 4d6 damage. Touching cooled objects causes 1d8 in cold damage. Metal softens (6 points per StP instead of 10.) Wood becomes very brittle (3 points per StP.) Paper burns. |
| 18 | Sixth or Sextupled | Touching heated objects cause 5d6 damage. Touching cooled objects causes 1d10 in cold damage. Mundane metals melt, while polyalloy metal softens (5 points per StP instead of 10.) Wood burns, paper incinerated. |