41. The crucial step is now, to assume that bound states appear as poles in the Green function. 42. However, the production of a muon / antimuon bound state , which is an onium, has been theorized. 43. Kaonium, which is a bound state of two oppositely charged kaons, has not been observed experimentally yet. 44. A macro holeum is a quantized gravitational bound state of a large number of micro black holes. 45. The I / O bound state has been identified as a problem in computing almost since its inception. 46. Then Hadamard's determinant bound states that 47. The wavefunction of the bound state is said to be " effective masses of the excited electron and hole. 48. She is noted for her research on Andreev bound states and is an expert in strongly correlated Fermionic systems. 49. Members of the GTP-bound states . 50. But there she was, in one of the most traditionally female roles, in one of the most tradition-bound states .