അപ്പോൾ ഇതിനെ ഇങ്ങനെ എഴുതാം, , ഒരു പ്രശ്നമാണ് ഇത് . അടുത്ത ഓർഡിനറി differential ഇക്വേഷൻ T യുടെ ആണ് , രണ്ടാം ഓർഡർ ടൈം ഡെറിവേറ്റീവ് .
ఇందులో ఒక సమస్య అవుతుంది మరియు T లలో రెండవ సాధారణ అవకలన సమీకరణం రెండవ సమస్య అవుతుంది.