This young pianist's first two Carnegie Hall recitals were rapturously received, but this program is a sterner test. Liszt's arrangement of Bach's Fantasy and Fugue in G minor (for organ) is hard enough, but his 12 "Transcendental �tudes" are the summit of pianistic virtuosity. Beethoven's last sonata, which eludes pianists three times Trifonov's age, will be tougher still. Bet on it all working out.