Labels:bulletin board | monitor | paper | plant | reckoner | sky OCR: GIVEN ZEGULAR BXPRESSION ANO STRING CAN WE DELIDE WHETHER GERI ERATES W THE LANG AGE R is regu lars expressim AREX that qenel rades string W DECIDABLE MOH KNOW? WE CAN BMILD WE CAN WRITE PROaRAM THAT GIV REG EXPRESSION ANO INPWT M WH ETHER REX AND THAT ALGORITMM M iM ALWAYS HAL THALTING THis SELF EVIDENT SOMETIMES WE DUaHT PROVE I7 CAREFULLY MANY PROWRAM CAN BE PROEN A WAYS MALT THis DOES NOT WM EAN THE HALTING PROBLEM DECIDABLE STRINL GERIERA LANGU generades IDABLE BUILD 2VHL STeN INPUT T7IM ERMINE HALT OPTEN EVDENT SOMET IMES PROBL