“Archamare’s constant,” Lyra translated, pointing to the odd symbol. It looked like an aitch, but the crossbar had been raised and bowed. Advanced Equestrian math generally used the old Pegos symbols, since the Oceanic tribe had been the first to produce real scientific observation—something that still grated at unicorns almost two millennia hence. There was a long debate amongst unicorn mathematicians if the number ever ended or repeated. Neighton had spent months calculating out digits, and managed a gross with no obvious pattern.