TY - JOUR TI - On the closedness of approximation spectra JO - Journal de théorie des nombres de Bordeaux PY - 2009 DA - 2009/// SP - 703 EP - 712 VL - 21 IS - 3 PB - Université Bordeaux 1 UR - https://jtnb.centre-mersenne.org/articles/10.5802/jtnb.696/ UR - https://zbmath.org/?q=an%3A1205.11083 UR - https://www.ams.org/mathscinet-getitem?mr=2605541 UR - https://doi.org/10.5802/jtnb.696 DO - 10.5802/jtnb.696 LA - en ID - JTNB_2009__21_3_703_0 ER -