The term infinitesimal calculus is identified in base64 scheme by the sequence aW5maW5pdGVzaW1hbCBjYWxjdWx1cw==, while the MD5 signature is equal to e642ad59a370ee6c12c03161b5240888. The ASCII encoding of infinitesimal calculus in hexadecimal notation is 696e66696e69746573696d616c2063616c63756c7573.