| Social forces are the cumulation and summation of the interrelated actions of individuals. |
| The organism or biotic factor is essentially vegetation and is the summation of the plant matter reaching the soil. |
| The next year, Littlewood proved a profound converse of a famous theorem of Norwegian mathematician Abel on the summation of series. |
| Total time spent providing eldercare represents the summation of time spent providing personal care and time spent providing other care. |
| A method of summation is called regular, if it sums every convergent series to its ordinary sum. |
| That is the view of two leading experts on the topic who, yesterday, published a mercifully brief and clear summation of the situation. |
