rb_big_minus     2676 bignum.c           rb_define_method(rb_cBignum, "-", rb_big_minus, 1);
rb_big_minus      110 include/ruby/intern.h VALUE rb_big_minus(VALUE, VALUE);
rb_big_minus     2119 numeric.c      	return rb_big_minus(x, y);
rb_big_minus      505 random.c                   limit = (struct RBignum *)rb_big_minus((VALUE)limit, INT2FIX(1));