Perhaps you should try some spelling variations:
"providing discrete-valued function" » "promising discrete-valued function" (Expand Search), "providing discrete-value function" (Expand Search), "providing discrete-values function" (Expand Search)
"impromising discrete-valued function" » "impromising discrete-value function" (Expand Search), "impromising discrete-values function" (Expand Search), "compromising discrete-valued function" (Expand Search), "promising discrete-valued function" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("providing discrete-valued function") OR ("impromising discrete-valued function"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"providing discrete-valued function\") OR (\"impromising discrete-valued function\"))".
• Removing quotes may allow a broader search: (( providing discrete-valued function ) OR ( impromising discrete-valued function )).
• Adding a wildcard symbol may retrieve word variants: (("providing discrete-valued function") OR ("impromising discrete-valued function"))*.