What is the lowest relative permeability with a skin depth larger than 0.112 inches?
CREATE TABLE "skin_depth_at_24_k_hz" (
  "material" text,
  "resistivity_10_6_ohm_inches" real,
  "relative_permeability" real,
  "skin_depth_inches" real,
  "surface_resistance_relative_to_copper" real
);
SELECT MIN("relative_permeability") FROM "skin_depth_at_24_k_hz" WHERE "skin_depth_inches">0.112;