**EXHIBIT  11**

**SI DIAMOND  TECHNOLOGY, INC.**

**COMPUTATION OF  (LOSS) PER COMMON SHARE**

|                                                                                                                                         |   | Three        months ended        December        31, |   | Year        ended        December        31, |
|----------------------------------------------------------------------------------------------------------------------------------------------|--------|------------------------------------------------------|--------|----------------------------------------------|
|                                                                                                                                              |        |                                                      |        |                                              |
|                                                                                                                                         |   | 2001                                                 |   | 2000                                         |   | 2001 |   | 2000 |
|                                                                                                                                         |   |                                                      |   |                                              |   |  |   |  |
| Computation of        income ( loss ) per common share:                                                                                      |   |                                                 |   |                                         |   |   |   |
|                                                                                                                                         |   |                                                 |   |                                         |   |   |   |
|    Net        income (loss) applicable to common                         shareholders |   |  $(1,263,610)                                   |        |  $(2,901,179)                           |  |  $(5,166,559) |   |  $(7,761,342) |
|                                                                                                                                         |   |                                                 |   |                                         |   |   |   |   |
|           Weighted average number of common shares                                                                                 |   | 66,859,367                                      |   | 59,671,805                              |   | 64,716,156  |   | 57,379,240  |
|                                                                                                                                         |   |                                                 |   |                                         |   |   |   |   |
|    Net        income (loss) per common share                                                                                       |   | $(0.02)                                              |   | $(0.05)                                      |   | $(0.08) |   | $(0.14) |

No computation of diluted loss per  common share is included for the any periods because such computation results  in an antidilutive loss per common share.