• Maxwell produced a set of equations that described ...
• These equations were derived ( or deduced , or set up , or developed ) recently.
• Maxwell produced a set of equations that described ...
• These equations were derived ( or deduced , or set up , or developed ) recently.
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012