• journal_title：Geophysics
• Contributor：Xiaobing Zhou
• Publisher：Society of Exploration Geophysicists
• Date：2009-
• Format：text/html
• Language：en
• Identifier：10.1190/1.3119482
• journal_abbrev：Geophysics
• issn：0016-8033
• volume：74
• issue：4
• firstpage：X3
• section：DISCUSSIONS

In “Gravity anomalies of 2D bodies with variable density contrast,” Zhang et al. derive a set of equations (9 and 10 in their paper) for a gravity anomaly at the origin of the coordinate system for a polygon mass body when the density contrast is a polynomial function of x and z. For convenience of discussion, I reproduce and renumber their equations 9 and 10 as, respectively