KYUNGPOOK MATHEMATICAL JOURNAL, cilt.59, sa.2, ss.233-240, 2019 (ESCI)
In the present paper, absolute matrix summability of infinite series is studied. A new theorem concerning absolute matrix summability factors, which generalizes a known theorem dealing with absolute Riesz summability factors of infinite series, is proved using almost increasing and delta-quasi-monotone sequences. Also, a result dealing with absolute Cesaro summability is given.