“Time Is a Mother” by Ocean Vuong (Penguin Press)Life’s aftermath ebbs and flows throughout Ocean Vuong’s poetry collection “Time Is a Mother.” An ode to his mother’s passing, Vuong orbits the contours of grief, embedding them into clausal configurations and juxtaposed tones. These structures are reflected in Vuong’s themes of time and place, parent and child, nation and individual, and strength and weakness as he unfolds the logic of loss.In “Snow Theory,” the poet lies in his mother’s outline in the snow, “something being destroyed in a blizzard.” In “Beautiful Short Loser,” he wears her wedding dress backwards in the street as he plays air guitar.