Plus - minus

Mediums:
Mixed media; burlap, leather, oil on a wooden canvas
 
Size:
122 W x 90 H x cm
 
Story:
Robert Recorde ( c. 1512 – 1558) was an Anglo-Welsh physician and mathematician. He invented the equals sign (=) and also introduced the pre-existing plus (+) and minus (−) signs to English speakers in 1557.